Pass `updated_at` to get only incremental changes since last update

Change auto selection behaviour of emoji and slash commands to be more UX/Type friendly

## What does this MR do?
In the context of a special command (starting with "/", ":", ...), the MR disables auto selection of first item in the dropdown suggestion menu, until at least a character has been typed.
This behavior change originated from #22058 and #23578 in which problems with the ":" special command were pointed out.

## Are there points in the code the reviewer needs to double check?
At lines +187 and +242 there were originally no sorters. Given what ``DefaultOptions.sorter`` does, I don't think it is a problem.

## Why was this MR needed?
To solve #22058 and #23578 

## 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
- [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 #22058 and #23578 

See merge request !7129

Improve ldap:check errors

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/21621. 

See merge request !6601

Remove an extra leading space from diff paste data

## What does this MR do?

Remove an extra leading space from diff paste data.

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

I have checked the following three patterns.

* inline diff
* parallel diff
* blob preview

## Why was this MR needed?

Diff paste data contain an extra leading space.
So it need to remove an extra leading space manually from pasted diff data.

## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) 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 [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] 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 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?

#14176

Closes #23899

See merge request !7133

Integrate CI emails into notification system

Closes #21930

See merge request !6342

[ci skip]
Signed-off-by: Rémy Coutable <remy@rymai.me>

Restore unauthenticated access to public container registries

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/24284

See merge request !2025
Signed-off-by: Rémy Coutable <remy@rymai.me>

Respect project visibility settings in the contributions calendar

This MR fixes a number of bugs relating to access controls and date selection of events for the contributions calendar

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/23403

See merge request !2019
Signed-off-by: Rémy Coutable <remy@rymai.me>

Ensure external users are not able to clone disabled repositories.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/23788

See merge request !2017
Signed-off-by: Rémy Coutable <remy@rymai.me>

Fix for HackerOne XSS vulnerability in markdown

This is an updated blacklist patch to fix https://dev.gitlab.org/gitlab/gitlabhq/merge_requests/2007. No text is removed. Dangerous schemes/protocols and invalid URIs are left intact but not linked.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/23153

See merge request !2015
Signed-off-by: Rémy Coutable <remy@rymai.me>

disable markdown in comments when referencing disabled features

fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/23548

This MR prevents the following references when tool is disabled:

- issues
- snippets
- commits - when repo is disabled
- commit range - when repo is disabled
- milestones

This MR does not prevent references to repository files, since they are just markdown links and don't leak
information.

See merge request !2011
Signed-off-by: Rémy Coutable <remy@rymai.me>

Honour issue and merge request visibility in their respective finders

This MR fixes a security issue with the IssuesFinder and MergeRequestFinder where they would return items the user did not have permission to see. This was most visible on the issue and merge requests page for a group containing projects that had set their issues or merge requests to "private".

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/22481

See merge request !2000

24146 Add focus state to buttons and dropdowns

## What does this MR do?
Adds focus state to buttons and dropdowns

## Are there points in the code the reviewer needs to double check?
All focus states of buttons and dropdowns :)

## Why was this MR needed?
Improve accessibility

## Screenshots (if relevant)
Before:
![Screen_Shot_2016-11-07_at_4.30.31_PM](/uploads/8db2ac5e225c78495797180faf7bdb28/Screen_Shot_2016-11-07_at_4.30.31_PM.png)
After:
![Screen_Shot_2016-11-07_at_4.30.16_PM](/uploads/4a81810cafe3063eef02b7bc87f8ce69/Screen_Shot_2016-11-07_at_4.30.16_PM.png)

## Does this MR meet the acceptance criteria?

- [ ] [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
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] 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 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 #24146

See merge request !7347

Bring back the old JIRA docs

## What does this MR do?

Bring back the old JIRA docs

## Why was this MR needed?

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6598 introduced new
JIRA settings, but that's not yet released. Since our documentation is currently
built using the master branch, users are having issues where the docs show
different settings than what GitLab's latest stable release supports.

## What are the relevant issue numbers?

https://gitlab.zendesk.com/agent/tickets/48003

See merge request !7365

It was previously possible for invalid credential errors to go unnoticed
in this task. Users would believe everything was configured correctly and
then sign in would fail with 'invalid credentials'. This adds a specific
bind check, plus catches errors connecting to the server. Also, specs :)