Ensure current user can retry a build before showing the 'Retry' button

## What does this MR do?

Fixes #20150.

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] Added for this feature/bug
  - [ ] 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 !5476

Add support for using RequestStore within Sidekiq tasks via SIDEKIQ_REQUEST_STORE env variable

See merge request !5054

Add missing escape at line end

Documentation fix, pretty simple.

See merge request !5422

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

Merge branch '20189-markdown-video-doesn-t-work-when-the-referenced-video-file-is-in-same-repo' into 'master'

Ensure relative paths for video are rewritten as we do for images

## What does this MR do?

This ensures that path to videos are rewritten as we do for images.

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

I've decided to add a new `Blob#video?` method for simplicity's sake but this should probably be added to `Gitlab::Git::Blob`.

## What are the relevant issue numbers?

Fixes #20189.

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] Added for this feature/bug
  - [ ] 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 !5474

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

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

Disable MySQL foreign key checks before dropping all tables

Fixes #20237. Disables MySQL foreign key checks before dropping all tables in a restore. MySQL doesn't honor `CASCADE` without a special flag when the database/tables are created. In order to drop the tables we need to disable foreign key checks. After the drop, re-enable the key checks. 

WIP: Pending confirmation from customer that this fix works. 

See merge request !5472

This significantly reduces the DB churn in the PostReceive task when it
performs reference extraction.

See #18663

Added '*.js.es6 gitlab-language=javascript' to .gitattributes

## What does this MR do?

According to the branch name this adds the `sytanx` highlighting for `.js.es6` files, but this actually adds the `syntax` highlighting. 😆 

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

Is this the right place? 🏃 

## Why was this MR needed?

We need pretty ES6 diffs.

## What are the relevant issue numbers?

Flyin' solo 🛫 

## 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 !5486

Fix CI status icon link underline

## What does this MR do?

Changes the CSS so that CI status icon does not underline when it is hovered over.

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

Just need to make sure there aren't any side effects (`.ci-status-link` being used without an icon).
To my knowledge, every instance of `.ci-status-link` is tied to a `.ci-status-icon-{statusName}`.

## Why was this MR needed?

Resolves existing bug

## What are the relevant issue numbers?

#20103 

## 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 !5408

Fixed dropdown search field height in ie11

## What does this MR do?

Fixes the height of the search input in dropdown menus.

## What are the relevant issue numbers?

Closes #19684 

## Screenshots (if relevant)

![Screen_Shot_2016-07-11_at_11.49.52](/uploads/fc25bc3d2c3bbd195f30d1953dc12662/Screen_Shot_2016-07-11_at_11.49.52.png)

See merge request !5179

Reduced diff email CSS

## What does this MR do?

Reduces the amount of inline CSS on the diff emails.

## What are the relevant issue numbers?

#15178 

See merge request !5203

Add green outline to New Branch button

## What does this MR do?

Add green outline to New Branch button on issue page.

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

Nope.

## Why was this MR needed?

The button was not very visible.

## What are the relevant issue numbers?

fixes #18928 

## Screenshots

### Before

![before](/uploads/3bc890e249ef4c3852605a6350c05b9a/before.png)

### After

![after](/uploads/bc627902ffa7c7b4ab20ee7a269fa44f/after.png)

See merge request !5447

Add es6 gem

## What does this MR do?
Add ES6 to ES5 compiling via Babel and the sprockets es6 gem.

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

## Why was this MR needed?
So we can write ES6

## What are the relevant issue numbers?
https://gitlab.com/gitlab-org/gitlab-ce/issues/20098

## Screenshots (if relevant)
![Screen_Shot_2016-07-25_at_10.56.02_AM](/uploads/04ceeedb8235fd3a7601bc4bece313a8/Screen_Shot_2016-07-25_at_10.56.02_AM.png)

![Screen_Shot_2016-07-25_at_10.55.54_AM](/uploads/163c46a3d878924ab1717fccca468003/Screen_Shot_2016-07-25_at_10.55.54_AM.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [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 [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 !5473

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

Fix backup restore

## What does this MR do?

This MR fixes the backup restore task.

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

Whether the mode 0277 makes sense. (Group SUID + group/user read/write permissions)

## Why was this MR needed?

86359ec8 broke this, and it was not caught by any specs. Users would see:

```
Restoring repositories ...
rake aborted!
NameError: undefined local variable or method `repos_path' for #<Backup::Repository:0x00000007cea1d8>
/opt/gitlab/embedded/service/gitlab-rails/lib/backup/repository.rb:59:in `restore'
/opt/gitlab/embedded/service/gitlab-rails/lib/tasks/gitlab/backup.rake:79:in `block (4 levels) in <top (required)>'
/opt/gitlab/embedded/service/gitlab-rails/lib/tasks/gitlab/backup.rake:54:in `block (3 levels) in <top (required)>'
Tasks: TOP => gitlab:backup:repo:restore
(See full trace by running task with --trace)
```

## What are the relevant issue numbers?

#20188

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [ ] Added for this feature/bug
  - [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 !5459

Instrument Nokogiri parsing methods

## What does this MR do?

This MR instruments the various parsing methods of Nokogiri.

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

No.

## Why was this MR needed?

This allows us to see how much time is spent in Nokogiri.

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- Tests
  - [x] ~~Added for this feature/bug~~
  - [ ] All builds are passing
- [x] 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)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5470

This allows us to see how much time is being spent in just parsing
HTML/XML documents.

Set permissions of backup dir to g+s

Closes #20188