Put issuable owner and participating people first on mention suggestions

Closes #14423

**Merge Requests**

Author and people who participated are first now


<img src="/uploads/dd75937627c61b5efe631b4a35f274c6/Screen_Shot_2016-03-29_at_6.41.29_PM.png" width="235" />

**Issues**

Author showing first and no people have participated

<img src="/uploads/e17aa96ffe7d46a7dbe293318e999e1d/Screen_Shot_2016-03-29_at_6.41.44_PM.png" width="279" />


See merge request !3448

Add test coverage parsing example for gcvor



See merge request !3629

Fix typos in CI docs.



See merge request !3709

Fix TYPO in the changelog



See merge request !3765

Remove extra spacing from merge request target branch name



See merge request !3758

Fix for import_url fields on projects containing third-party credentials

Fixes https://dev.gitlab.org/gitlab/gitlabhq/issues/2658 

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/13955

See merge request !3066

Updated MR compare

Based on in feedback in !3228

See merge request !3704

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

Use rugged to change HEAD

_Originally opened at !2850 by @pmq20._

Needless to invoke gitlab_shell here, which is slow.

See merge request !3705

Issuable can be assigned to author

Closes #9014

The only difference with #9014 is that I thoughed the author should also be
able to assign the issue. If this is unwanted behavior Ill revert it.

/cc @DouweM

See merge request !2765

Delete tags via rugged

Improve the performance by directly using rugged instead of shelling out to a git operation.

See merge request !3748

Remove unused backend methods

Those backend methods are not used anymore since the functionality of them is replaced with rugged.

See merge request !3746

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

Fix required gitlab-shell version in the 8.5 to 8.6 update doc.

Make /profile/keys/new redirects to /profile/keys for back-compat

This addresses https://github.com/gitlabhq/gitlabhq/issues/10138.

See merge request !3717

Do not include award emojis in issue view comment_count

## What does this MR do?

Fixes Issue #14431, changing comment_count on issues index view to not include award emoji comments. While including them is technically correct, it feel nonintuitive in the way comments are presented.

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

No

## Why was this MR needed?

Improves UX of issues view

## What are the relevant issue numbers?

#14431

## Screenshots

### Before
 - ![Issues before](https://monosnap.com/file/cs7lcEkcChXXvAV22y2gh7gBFWCWjj.png)
 - ![MR before](https://monosnap.com/file/qzOawShznyXMKK3Z5cij4SKrHO4jNy.png)
### After
 - ![Issues after](https://monosnap.com/file/IWMedIiGnDnCly7zI5BwNTYQuCS8fH.png)
 - ![MR after](https://monosnap.com/file/mXJu1C2OVo5DGK0XdD67vPZGNPAw4L.png)


See merge request !3610

Report: https://github.com/gitlabhq/gitlabhq/issues/10138Signed-off-by: Rémy Coutable <remy@rymai.me>

Escape the query argument provided to `git grep` by `search_files`

Closes #14963.

See merge request !3633