Fix markdown help references

## What does this MR do?
Replaces all `markdown/markdown` references with `user/markdown` since `markdown/markdown.md` has been replaced with `user/markdown.md`

## Are there points in the code the reviewer needs to double check?
Shouldn't be any 😄 

## Why was this MR needed?
So that users who click on markdown help don't have to click/redirect to another link to get to the markdown help page

## What are the relevant issue numbers?
Closes #21434

## Screenshots (if relevant)
```
$git grep markdown/markdown
app/helpers/search_helper.rb:47:      { category: "Help", label: "Markdown Help",      url: help_page_path("markdown/markdown") },
app/views/admin/appearances/_form.html.haml:16:        Description parsed with #{link_to "GitLab Flavored Markdown", help_page_path('markdown/markdown'), target: '_blank'}.
app/views/help/ui.html.haml:552:  You can check how markdown rendered at #{link_to 'Markdown help page', help_page_path("markdown/markdown")}.
doc/development/doc_styleguide.md:425:[gfm]: http://docs.gitlab.com/ce/markdown/markdown.html#newlines "GitLab flavored markdown documentation"
doc/user/markdown.md:69:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#newlines
doc/user/markdown.md:89:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#multiple-underscores-in-words
doc/user/markdown.md:104:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#url-auto-linking
doc/user/markdown.md:125:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#multiline-blockquote
doc/user/markdown.md:159:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#code-and-syntax-highlighting
doc/user/markdown.md:229:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#inline-diff
doc/user/markdown.md:245:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#emoji
doc/user/markdown.md:310:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#task-lists
doc/user/markdown.md:333:https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md#videos
doc/user/markdown.md:783:[markdown.md]: https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/markdown/markdown.md
spec/routing/routing_spec.rb:110:    path = '/help/markdown/markdown.md'
spec/routing/routing_spec.rb:112:                                  path: 'markdown/markdown',
```

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !6024

Add font color contrast to external label in admin area

## What does this MR do?
Adds a darker font color to `.label-default` so that the labels have more contrast

## Are there points in the code the reviewer needs to double check?
~~I used the same font color as the `.badge` on that same page but it was not listed as a variable in `variables.scss`. I'm not sure if both references need to be added as a sass variable or whether they should be replaced with an existing color in the variables list.~~

In reference to [Dmitriy's note about the colors](https://gitlab.com/gitlab-org/gitlab-ce/issues/20114#note_13251919), I changed the color to `$btn-transparent-color` and also took the liberty to change it on the navigation badges as well.

## Why was this MR needed?
Improves existing UI

## What are the relevant issue numbers?
Closes #20744 

## Screenshots (if relevant)
Before:
![Screen_Shot_2016-08-09_at_2.49.04_PM](/uploads/df8f402cc1dd423a2c37c9f4067b95f8/Screen_Shot_2016-08-09_at_2.49.04_PM.png)

After:
![Screen_Shot_2016-08-09_at_3.32.54_PM](/uploads/396f6679618630cab7a40e432f259084/Screen_Shot_2016-08-09_at_3.32.54_PM.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5743

Fix enormous IE11 fork button

## What does this MR do?
Puts a width on btn SVGs because IE can't handle `auto`

## What are the relevant issue numbers?
Closes #21099

See merge request !5982

Update pipelines.md

## What does this MR do?

attempt to solve:
https://gitlab.com/gitlab-org/gitlab-ce/commit/a03cadcdbf3024ec59234a07a9b87884de5cc7dc#note_14172234

the word isn't visible anyway, don't know what original author intended to say. at least it fixes the `stages` link now.

## Does this MR meet the acceptance criteria?

- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)

See merge request !6040

Fix `Stack Build` wizard description in koding.md

## What does this MR do?
Fixes the language in the `Stack Build` wizard description.

See merge request !6041

Curved lines at top of pipeline graph

#### What does this MR do?
Adds curved lines to second-child of each column
## Are there points in the code the reviewer needs to double check?

#### Why was this MR needed?
To match the mockup

#### What are the relevant issue numbers?
Closes #21126 

#### Screenshots (if relevant)
![Screen_Shot_2016-08-26_at_9.31.49_AM](/uploads/318d3df4ce909daa0ef8ea8d989211c4/Screen_Shot_2016-08-26_at_9.31.49_AM.png)

See merge request !6033

Add horizontal scrolling to all sub-navs on mobile viewports

## What does this MR do?
Adds horizontal scrolling to all the sub navigation on mobile views. This was previously only available on the repository tab (commits page). 

## Are there points in the code the reviewer needs to double check?
Perhaps a better way to refactor out the common haml code

## Why was this MR needed?
Adding it to all to keep the UI consistency and to offer mobile users a better interface

## What are the relevant issue numbers?
Closes #20779 

## Screenshots (if relevant)
Before:
![Screen_Shot_2016-08-23_at_3.52.35_PM](/uploads/3833da4252cf616266a77654cee89faf/Screen_Shot_2016-08-23_at_3.52.35_PM.png)

After:
![Screen_Shot_2016-08-23_at_3.52.21_PM](/uploads/5a023bb1e639f16f2471009dd6ae0d62/Screen_Shot_2016-08-23_at_3.52.21_PM.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5762

Reduce contributions calendar data payload

## What does this MR do?
Reduces the contributions calendar data payload by only passing contribution dates and counts

## Are there points in the code the reviewer needs to double check?
Please double check my javascript code 😃 

## Why was this MR needed?

Reduce user's bandwidth and decrease website loading time

## What are the relevant issue numbers?
Closes #20862 

## Screenshots (if relevant)
Before:
![Screen_Shot_2016-08-11_at_3.55.55_PM](/uploads/382842b3c889978bb302bd9057701ec3/Screen_Shot_2016-08-11_at_3.55.55_PM.png)
```
new Calendar(
  {"1439269200":0,"1439355600":0,"1439442000":0,"1439528400":0,"1439614800":0,"1439701200":0,"1439787600":0,"1439874000":0,"1439960400":0,"1440046800":0,"1440133200":0,"1440219600":0,"1440306000":0,"1440392400":0,"1440478800":0,"1440565200":0,"1440651600":0,"1440738000":0,"1440824400":0,"1440910800":0,"1440997200":0,"1441083600":0,"1441170000":0,"1441256400":0,"1441342800":0,"1441429200":0,"1441515600":0,"1441602000":0,"1441688400":0,"1441774800":0,"1441861200":0,"1441947600":0,"1442034000":0,"1442120400":0,"1442206800":0,"1442293200":0,"1442379600":0,"1442466000":0,"1442552400":0,"1442638800":0,"1442725200":0,"1442811600":0,"1442898000":0,"1442984400":0,"1443070800":0,"1443157200":0,"1443243600":0,"1443330000":0,"1443416400":0,"1443502800":0,"1443589200":0,"1443675600":0,"1443762000":0,"1443848400":0,"1443934800":0,"1444021200":0,"1444107600":0,"1444194000":0,"1444280400":0,"1444366800":0,"1444453200":0,"1444539600":0,"1444626000":0,"1444712400":0,"1444798800":0,"1444885200":0,"1444971600":0,"1445058000":0,"1445144400":0,"1445230800":0,"1445317200":0,"1445403600":0,"1445490000":0,"1445576400":0,"1445662800":0,"1445749200":0,"1445835600":0,"1445922000":0,"1446008400":0,"1446094800":0,"1446181200":0,"1446267600":0,"1446354000":0,"1446444000":0,"1446530400":0,"1446616800":0,"1446703200":0,"1446789600":0,"1446876000":0,"1446962400":0,"1447048800":0,"1447135200":0,"1447221600":0,"1447308000":0,"1447394400":0,"1447480800":0,"1447567200":0,"1447653600":0,"1447740000":0,"1447826400":0,"1447912800":0,"1447999200":0,"1448085600":0,"1448172000":0,"1448258400":0,"1448344800":0,"1448431200":0,"1448517600":0,"1448604000":0,"1448690400":0,"1448776800":0,"1448863200":0,"1448949600":0,"1449036000":0,"1449122400":0,"1449208800":0,"1449295200":0,"1449381600":0,"1449468000":0,"1449554400":0,"1449640800":0,"1449727200":0,"1449813600":0,"1449900000":0,"1449986400":0,"1450072800":0,"1450159200":0,"1450245600":0,"1450332000":0,"1450418400":0,"1450504800":0,"1450591200":0,"1450677600":0,"1450764000":0,"1450850400":0,"1450936800":0,"1451023200":0,"1451109600":0,"1451196000":0,"1451282400":0,"1451368800":0,"1451455200":0,"1451541600":0,"1451628000":0,"1451714400":0,"1451800800":0,"1451887200":0,"1451973600":0,"1452060000":0,"1452146400":0,"1452232800":0,"1452319200":0,"1452405600":0,"1452492000":0,"1452578400":0,"1452664800":0,"1452751200":0,"1452837600":0,"1452924000":0,"1453010400":0,"1453096800":0,"1453183200":0,"1453269600":0,"1453356000":0,"1453442400":0,"1453528800":0,"1453615200":0,"1453701600":0,"1453788000":0,"1453874400":0,"1453960800":0,"1454047200":0,"1454133600":0,"1454220000":0,"1454306400":0,"1454392800":0,"1454479200":0,"1454565600":0,"1454652000":0,"1454738400":0,"1454824800":0,"1454911200":0,"1454997600":0,"1455084000":0,"1455170400":0,"1455256800":0,"1455343200":0,"1455429600":0,"1455516000":0,"1455602400":0,"1455688800":0,"1455775200":0,"1455861600":0,"1455948000":0,"1456034400":0,"1456120800":0,"1456207200":0,"1456293600":0,"1456380000":0,"1456466400":0,"1456552800":0,"1456639200":0,"1456725600":0,"1456812000":0,"1456898400":0,"1456984800":0,"1457071200":0,"1457157600":0,"1457244000":0,"1457330400":0,"1457416800":0,"1457503200":0,"1457589600":0,"1457676000":0,"1457762400":0,"1457848800":0,"1457931600":0,"1458018000":0,"1458104400":0,"1458190800":0,"1458277200":0,"1458363600":0,"1458450000":0,"1458536400":0,"1458622800":0,"1458709200":0,"1458795600":0,"1458882000":0,"1458968400":0,"1459054800":0,"1459141200":0,"1459227600":0,"1459314000":0,"1459400400":0,"1459486800":0,"1459573200":0,"1459659600":0,"1459746000":0,"1459832400":0,"1459918800":0,"1460005200":0,"1460091600":0,"1460178000":0,"1460264400":0,"1460350800":0,"1460437200":0,"1460523600":0,"1460610000":0,"1460696400":0,"1460782800":0,"1460869200":0,"1460955600":0,"1461042000":0,"1461128400":0,"1461214800":0,"1461301200":0,"1461387600":0,"1461474000":0,"1461560400":0,"1461646800":0,"1461733200":0,"1461819600":0,"1461906000":0,"1461992400":0,"1462078800":0,"1462165200":0,"1462251600":0,"1462338000":0,"1462424400":0,"1462510800":0,"1462597200":0,"1462683600":0,"1462770000":0,"1462856400":0,"1462942800":0,"1463029200":0,"1463115600":0,"1463202000":0,"1463288400":0,"1463374800":0,"1463461200":0,"1463547600":0,"1463634000":0,"1463720400":0,"1463806800":0,"1463893200":0,"1463979600":0,"1464066000":0,"1464152400":0,"1464238800":0,"1464325200":0,"1464411600":0,"1464498000":0,"1464584400":0,"1464670800":0,"1464757200":0,"1464843600":0,"1464930000":0,"1465016400":0,"1465102800":0,"1465189200":0,"1465275600":0,"1465362000":0,"1465448400":0,"1465534800":0,"1465621200":0,"1465707600":0,"1465794000":0,"1465880400":0,"1465966800":0,"1466053200":0,"1466139600":0,"1466226000":0,"1466312400":0,"1466398800":0,"1466485200":0,"1466571600":0,"1466658000":0,"1466744400":0,"1466830800":0,"1466917200":0,"1467003600":0,"1467090000":0,"1467176400":0,"1467262800":0,"1467349200":0,"1467435600":0,"1467522000":0,"1467608400":0,"1467694800":0,"1467781200":0,"1467867600":0,"1467954000":0,"1468040400":0,"1468126800":0,"1468213200":0,"1468299600":0,"1468386000":0,"1468472400":0,"1468558800":0,"1468645200":0,"1468731600":0,"1468818000":0,"1468904400":0,"1468990800":0,"1469077200":0,"1469163600":17,"1469250000":0,"1469336400":0,"1469422800":3,"1469509200":14,"1469595600":54,"1469682000":0,"1469768400":4,"1469854800":1,"1469941200":0,"1470027600":0,"1470114000":0,"1470200400":1,"1470286800":0,"1470373200":1,"1470459600":0,"1470546000":0,"1470632400":0,"1470718800":0,"1470805200":0,"1470891600":2},
  '/u/root/calendar_activities'
);
```


After:
![Screen_Shot_2016-08-11_at_3.56.36_PM](/uploads/9325cdb8c0271075abee2a838c1a0787/Screen_Shot_2016-08-11_at_3.56.36_PM.png)

```
new Calendar(
  {"1469163600":17,"1469422800":3,"1469509200":14,"1469595600":54,"1469768400":4,"1469854800":1,"1470200400":1,"1470373200":1,"1470891600":2},
  '/u/root/calendar_activities'
);
```
## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5784

Capitalize mentioned issue timeline notes

## What does this MR do?
Renames `mentioned in` to `Mentioned in` for issue timeline notes

## Are there points in the code the reviewer needs to double check?
Shouldn't be any 😄 

## Why was this MR needed?
Resolves existing UI inconsistency as all the other issue timeline notes have their first letter capitalized.

## What are the relevant issue numbers?
Closes #21416 

## Screenshots (if relevant)
Before:
![Screen_Shot_2016-08-25_at_10.52.47_AM](/uploads/61de0a7d65fd739a6e565f6e63d2f52d/Screen_Shot_2016-08-25_at_10.52.47_AM.png)

After:
![Screen_Shot_2016-08-25_at_10.52.05_AM](/uploads/f67f353c285453306d6b80578b11e587/Screen_Shot_2016-08-25_at_10.52.05_AM.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !6028

Add hover color to emoji icon

## What does this MR do?
Adds hover color to emoji icon in discussions

## Are there points in the code the reviewer needs to double check?
Shouldn't be

## Why was this MR needed?
Keep consistency of color highlighting to indicate action icon

## What are the relevant issue numbers?
Closes #20629 

## Screenshots (if relevant)
Before:
![Gcy0V4Cjp9](/uploads/96a7a683fe2d526b74a05d7cc91c9fa0/Gcy0V4Cjp9.gif)
After:
![TAmusA6o1z](/uploads/1baf20390d2f1442b5fae84ae42914ce/TAmusA6o1z.gif)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5673

Fix external issue tracker "Issues" link leading to 404s

## What does this MR do?

This MR fixes the redirection to the wrong URL when using an external issue tracker, such as JIRA or Redmine.  a70431f8 modified the behavior to link to the external issue tracker
issues URL instead of the project path URL. This restores the previous behavior.

## Why was this MR needed?

The issues URL often has `:id` associated with it for linking mentioned issues.
For external issue trackers, the project page is the intended target.

## What are the relevant issue numbers?

Closes #21252

Related to #21402

See merge request !6006

Update abuse_reports.js.es6 with prettier `window.gl` assignment

## What does this MR do?

Update abuse_reports.js.es6 with prettier `window.gl` assignment provided by @selfup

**Very small change** but marks the beginning of some frontend guidelines I will soon create.

## Are there points in the code the reviewer needs to double check?

## Why was this MR needed?

## What are the relevant issue numbers?

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [ ] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [ ] API support added
- Tests
  - [ ] Added for this feature/bug
  - [ ] All builds are passing
- [ ] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [ ] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5977

a70431f8 modified the behavior to link to the external issue tracker
issues URL instead of the project path URL. This restores the
previous behavior.

Closes #21252, #21402

Fix changelog



See merge request !6035

Add lock_version to merge_requests table

Add lock_version to merge_requests table

Closes #21465

It appears this column was mistakenly omitted in !5623 due to rebasing
issues in earlier comments.

See merge request !6037

Fix groups sort dropdown alignment

## What does this MR do?
Changes the dropdown located on the [explore groups page](https://gitlab.com/explore/groups) from left aligned to right aligned.

## Are there points in the code the reviewer needs to double check?
Shouldn't be

## Why was this MR needed?
Keeps the UI consistent for dropdowns as they are right aligned on other pages

## What are the relevant issue numbers?
Closes #21296

## Screenshots (if relevant)

Before:
![Screen_Shot_2016-08-23_at_11.21.01_AM](/uploads/9723d0166b80dcb8d7b0228063e39a77/Screen_Shot_2016-08-23_at_11.21.01_AM.png)

After:
![Screen_Shot_2016-08-23_at_11.20.52_AM](/uploads/5a55a72c10909142d02a23710736a93f/Screen_Shot_2016-08-23_at_11.20.52_AM.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5963

Closes #21465

It appears this column was mistakenly omitted in !5623 due to rebasing
issues in earlier comments.

Remove max height on pipelines graph

#### What does this MR do?
Removes max-height from pipeline graph

#### Why was this MR needed?
The height was originally put in place because some stages have ~20 tests, which ends up looking a little lopsided and there's a large amount of white space. The scrolling container, however, is not the best solution and ends up being more difficult to scroll around to find what you're looking for. For now we can remove the height, and eventually we'll have the similar tests collapsed.

#### Screenshots (if relevant)
Before:
![Screen_Shot_2016-08-24_at_11.32.39_AM](/uploads/1b32403548c6f7f4189a19279f13b84b/Screen_Shot_2016-08-24_at_11.32.39_AM.png)
After:
![Screen_Shot_2016-08-24_at_11.28.57_AM](/uploads/1327e37429b881265429f559d9d56482/Screen_Shot_2016-08-24_at_11.28.57_AM.png)

See merge request !5988

Fix inline emoji text alignment

## What does this MR do?
Changes the vertical alignment of inline emoji text from `middle` to `top`

## Are there points in the code the reviewer needs to double check?
Potential emoji side effects (I couldn't find any)

## Why was this MR needed?
Fixes UI inconsistency

## What are the relevant issue numbers?
Closes #21403 

## Screenshots (if relevant)
Before:
![Screen_Shot_2016-08-25_at_9.57.41_AM](/uploads/b7ce1da8d0eaaea3391502238a92fc77/Screen_Shot_2016-08-25_at_9.57.41_AM.png)

After:
![Screen_Shot_2016-08-25_at_9.57.49_AM](/uploads/8649c14764c3f616c487be115505c49a/Screen_Shot_2016-08-25_at_9.57.49_AM.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !6027

Remove ugly horizontal scrollbars in windows

## What does this MR do?
Removes horizontal scrollbars from pipelines view 

## Why was this MR needed?
It looked terrible.

## What are the relevant issue numbers?
Closes #21146

See merge request !5942

Fix unnecessary horizontal scroll area in pipeline visualizations

## What does this MR do?

Removes a min-width attribute for the build pipeline visualization wrapper

## Are there points in the code the reviewer needs to double check?

I am curious why this line was there in the first place.  Perhaps I'm just not seeing it.

## Why was this MR needed?

I was noticing an unnecessary horizontal scroll bar when viewing pipeline visualizations embedded in merge request builds tab:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5627/builds

## What are the relevant issue numbers?

Line appears to have been introduced in !5742

## Screenshots (if relevant)

![Screen_Shot_2016-08-24_at_11.15.13_PM](/uploads/e395ed8d4415187735d06b8386fe4633/Screen_Shot_2016-08-24_at_11.15.13_PM.png)

## Does this MR meet the acceptance criteria?

As this is a very simple cosmetic change, I don't think it warrants inclusion in the changelog, documentation, or tests.

- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !6005

Handle non-UTF-8 conflicts gracefully

## What does this MR do?

If a conflict file isn't in a UTF-8-compatible encoding, we can't resolve it in the UI.

## What are the relevant issue numbers?

Closes #21247. 

See merge request !5961

If the received id is still a pending todo mark it as done

## What does this MR do?

Just return properly on stale todos, for me is annoying to mark as done a todo that is already done and the done hung there forever, so I have to refresh the page. I decided to resolve the issue myself.

## What are the relevant issue numbers?

Closes #19730

See merge request !5795

rename Statuseable to HasStatus

## What does this MR do?

- Rename all instances of Statuseable in the codebase, to HasStatus
- Rename all files from statuseable to has_status

## What are the relevant issue numbers?

Closes #21103 

See merge request !6003