Right now, the following naming scheme for diff files is used: diff-1, diff-2, ... and also we have "internal" format which is file-path-HASH, where HASH is sha1 of file path.
Besides, we have HASH_lineA_lineB format to link exact line number in MR diff. It makes sence to unify the way we link diff from outside, while leave "file-path-HASH" format for internal (js) usage.
Changes in this commit  allow to link diff just by HASH, if we don't want specify exact lines, also it changes "file-path-HASH" and "diff-NUMBER" links in code to this unified format.

Inspired by #24010 and !7298

On page merge_requests/n/diffs and merge_requests/n/commits 'shown.bs.tab' event triggers twice when tab is loading  which lead to  extra ajax request for data each time.
This commit prevent this event from triggering twice when tab is loading.

Fix project records with invalid visibility_level values

See merge request !7391

Fix the collapsed diff  when converting a symlink to a regular file

#21610 
!6828

See merge request !6953

Require projects before creating milestone

Closes #24101

See merge request !7301

Use GitLab.com link, remove GitHub link

Fix dead link GitHub=>GitLab

See merge request !7418

Use config param in `Repository#update_ref!`

See merge request !7395

Remove additional padding on right-aligned items in MR widget.

## What does this MR do?
Remove additional padding on right-aligned items in MR widget. So links look aligned.

## Are there points in the code the reviewer needs to double check?
No.

## Why was this MR needed?
Because the links are not aligned.

## Screenshots (if relevant)
![Screen_Shot_2016-11-10_at_22.38.26](/uploads/a1deacb77483125df3c25c320f53b579/Screen_Shot_2016-11-10_at_22.38.26.png)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) 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
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [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 it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?
Closes #24369

See merge request !7411

Removed gray button styling from todo buttons in sidebars

## What does this MR do?
Removes gray button styling from todo buttons in sidebars

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


## Why was this MR needed?
gray buttons are inconsistent and look disabled

## Screenshots (if relevant)

before:
![image](/uploads/98644ce1df8c903a2409fa066bca8195/image.png)

after:
![image](/uploads/a2eb8a9c40c4e5cc081553647bde8235/image.png)


## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) 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
  - [x] All builds are passing
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [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 it does - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes #24279

See merge request !7387

Fixes #24369.

Resize skipped icon

Resizes `skipped` icon to match all other status icons
![Screen_Shot_2016-11-10_at_7.35.07_AM](/uploads/5be0dc0638f12a3c984af747a03ce1e1/Screen_Shot_2016-11-10_at_7.35.07_AM.png)


Closes #24353

See merge request !7401

Fix no "Register" tab if ldap auth is enabled (#24038)

Closes #24038

See merge request !7274

Resolves divider issue in group setting dropdown

## What does this MR do?
This MR resolves the issue #24048 
##  Are there points in the code the reviewer needs to double check?
NR
## Why was this MR needed?
This MR removes extra divider from group setting dropdown when there is only one entry to show. This improves UX
## Screenshots (if relevant)

**Before**
![dd-before](/uploads/b4696b610a921a710c6be74fbb212260/dd-before.png)

**After**
![Screen_Shot_2016-11-10_at_4.09.36_PM](/uploads/a4ff6efe92ce60837afad079398c3880/Screen_Shot_2016-11-10_at_4.09.36_PM.png)

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [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 it does - rebase it please)
- [ ] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

Closes #24048

See merge request !7398

The AddVisibilityLevelToGroups migration introduced a visibility_level for
namespaces and specified that projects should always have a visibility level
less than or equal to their namespace. However, some invalid rows could have
been created.

This commit introduces a migration that updates the invalid rows, setting the
invalid project to have the same visibility_level as their namespaces. This
will make some projects internal or private when they would previously have
been public or internal, but this is better than silently making an internal
or private group public.

In this case comparing old_path and new_path is not enough because there
are two entires that match.

This commit is dedicated to GuilhemB, thanks for supporting me on Tipeee
:-)

Make toggle pipeline btn into button element

Toggle pipeline graph button was a `div` instead of a `button` ☹

See merge request !7404

Grapify triggers API

## What are the relevant issue numbers?

Related to #22928

See merge request !7378

Fix error when using invalid branch name when creating a new pipeline

## What does this MR do?

This MR fixes `500` error when creating a new pipeline though user interface ("Run pipeline")

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

Is this a good approach to catch those exceptions on `Repository` level?

## Does this MR meet the acceptance criteria?

- [x] [Changelog entry](https://docs.gitlab.com/ce/development/changelog.html) added
- Tests
  - [x] Added for this feature/bug

## What are the relevant issue numbers?

Closes #23982

See merge request !7324

Fix cache for commit status in commits list to respect branches

Fix cache for commit status in commits list to respect branches

Closes #24324

See merge request !7372

Use 'Forking in progress' title when appropriate

See merge request !7394

Resolve "Improve ee_compat_check task (part 3)"

Improve the `ee_compat_check` task with caching and keep artifacts on failure.

Closes #23945.

See merge request !7177

Import University training preso slides

## What does this MR do?

Adds missing training material from University.

## What are the relevant issue numbers?

Closes #23502

See merge request !7016

Grapify milestones API

## What are the relevant issue numbers?

Related to #22928

See merge request !7373

Grapify runners API

## What are the relevant issue numbers?

Related to #22928

See merge request !7377

Grapify the session API

## What are the relevant issue numbers?

Related to #22928

See merge request !7381

Signed-off-by: Rémy Coutable <remy@rymai.me>

Add api endpoint `/groups/owned`

See merge request !7103