Use gitlab-workhorse 0.5.3

See merge request !2367

Optimize LDAP and add a search timeout

Related to #4282 

This merge request arranges some things in `access.rb` to facilitate some optimizations in EE (to come later). It also adds a 10 second timeout to all LDAP searches so the entire worker is not blocked if some query doesn't return in a reasonable amount of time. This timeout is configurable per LDAP server.

See merge request !2267

See merge request !2370

Without this it's impossible to find out what methods/views/queries are
executed by a certain controller or Sidekiq worker. While this will
increase the total number of series it should stay within reasonable
limits due to the amount of "actions" being small enough.

Add versions to omniauth_crowd and omniauth-azure-oauth2

Also sorts them alphabetically, because OCD.

See merge request !2364

Improve performance of getting issues on group level

For testing I used the URL http://localhost:3000/groups/gitlab-org/issues?milestone_title=8.1. Prior to these changes said URL would take about 10-12 seconds to load. By applying these changes the loading time has been reduced to roughly 2-3 seconds. 

There's still some stuff going on in some views that I have to look at, resolving those changes might reduce the loading time a bit more. I also still have to check if I didn't break too many tests.

Fixes: gitlab-org/gitlab-ce#3707 gitlab-org/gitlab-ce#4071 

See merge request !2318

Use WOFF versions of SourceSansPro

See https://gitlab.com/gitlab-org/gitlab-ce/issues/6023

See merge request !2357

Refactor ZenMode

- No longer depends on the "hidden checkbox".
- No longer depends on manually storing/restoring the scroll position.
  Instead, we take advantage of jquery.scrollTo.
- Event-based.
- Simplifies the state-based styling.

See merge request !2354

use JavaScript instead of CoffeeScript in Views for master

Fix caching issue where build status was not updating in project dashboard

The project dashboard page would show a stale build status since the caching key did not depend on it. Fix by adding the commit status if CI is applicable.

Closes #3268

See merge request !2353

Only load autocomplete data when actually needed



See merge request !2365

Fix typo in build page of projects

The column containing links to the builds is named Runner but actually
contains the Build.

See merge request !2347

Update docs for shared runner default settings

GitLab 8.2 updated shared runners to default to `ENABLED` on all projects.

Fixes #5993

See merge request !2358

Previously this would result in autocomplete data being loaded for every
page (e.g. the page showing all Git branches of a project).

Load autocomplete data when loading an issue page



See merge request !2312

fixes new branch button positioning, when visible and not visible container

Fixes #5893
#5893 was not completely fixed. If a new branch was pushed the container is in correct position but if no container existed the position was incorrect. This MR fixes that. 

See merge request !2348

Add pencil icon to edit group settings

Move icons to upper-right corner of group page

Before:

![image](/uploads/6694c33eae6e10a4e21efef465a07114/image.png)

After:

![image](/uploads/0c17c2cf89fc0fde4344911b30f2635c/image.png)

Closes #6038

See merge request !2361

Added housekeeping for git repositories

This merge request will add a housekeeping button in the project setting page which invoke the gitlab shell to run a `git gc` in the project repository.

see gitlab-org/gitlab-ce#3041

Depends on gitlab-org/gitlab-shell!23 which has been merged.


See merge request !1658

Issue#5817 Improve wording of the web hooks page on the project's setting

Merge Request !2362 had  a typo, I'm resubmitting the merge request about issue #5817.

See merge request !2363

Move icons to upper-right corner of group page

Closes #6038

Fix Error 500 when visiting build page of project with nil runners_token

Properly ensure that the token exists and add defensively check for a
non-nil value.

Closes #4294

See merge request !2294

Properly ensure that the token exists and add defensively check for a
non-nil value.

Closes #4294

Also sorts them alphabetically, because OCD.

[ci skip]

Do not call API if there is no API URL

Fixes #5878 

CE users may not be interested in the new JIRA features. In this case,
we should detect they haven't set an API URL and fallback to the
behavior pre-8.3. This patch does that very easily.

There are planned improvements to JIRA in future releases such as
gitlab-org/gitlab-ce#5541 which will make this more configurable.

See merge request !2341

Add CHANGELOG entry for reply-by-email fix

[ci skip]

See merge request !2359

The column containing links to the builds is named Runner but actually
contains the Build ID.

[ci skip]

Fixes #5993

Disable "Already Blocked" button in admin abuse report page

See merge request !2360

[ci skip]