Minor refactoring of elastic indexer worker



See merge request !210

Does not create a Todo when commenting on commit or project snippet

Closes #13733

See merge request !2964

Improve weight filter for issues

Adds options: Any, No weight and Everything.

Fixes https://gitlab.com/gitlab-org/gitlab-ee/issues/274

See merge request !172

Commit status now requires developer role

cc/ @ayufan 

See merge request !224

Fix incorrect git_hook API docs

Docs did not match the actual API.

See merge request !225

# Conflicts:
#	app/views/shared/issuable/_sidebar.html.haml

Fix order in Gemfile.lock

See merge request !2969

[ci skip]

[ci skip]

Issue sidebar collapsed hidden helper class

![Screen_Shot_2016-02-25_at_10.44.16](/uploads/dae0f74a69b191387b7e2d3c4785fb3b/Screen_Shot_2016-02-25_at_10.44.16.png)

See merge request !222

Update LDAP group links asynchronously



See merge request !190

Sidebar overlaps content when screen is below 1200px.

When screen is below 1200px, the sidebar overlaps.
When screen is above 1200px, the sidebar pushes content out.
z-index change to make sure hamburger stays on top.
Fixes #12717 
![screensize](/uploads/9a21fa06d583a49d6ebbf1ada34c6792/screensize.gif)

![screensize-small](/uploads/7c25f46e962248a40840562a01c83f8f/screensize-small.gif)

Also sorry I couldn't get the collapse button in the screen cap. It's there. 


See merge request !2620

Shrink on diff view

* Shrinks when navigating to diff view.
* Shrinks when refreshing on diff view.
* Expandable at anytime.

![diff](/uploads/ec3ff1e7be7571a3af251e9ec9f704c1/diff.gif)


See merge request !2735

Fixed ~git beeing displayed as link to issues tagged with git in architecture.md

The architecture documentation explains `~git` from the picture below which is replaced by a [link to issues tagged with `git`](https://gitlab.com/gitlab-org/gitlab-ce/issues?label_name=git). I believe that this was unintended and should be fixed by using backticks.

![Screenshot_from_2016-02-13_21-36-30](/uploads/5ea1a60e8b230952874e58eab0abe1ac/Screenshot_from_2016-02-13_21-36-30.png)

See merge request !2814

Update commit status permissions [ci skip]

cc @axil 


See merge request !2942

update ci configuration to send slack notifications on failure

Updates CI config file and adds a task to send notifications when a build fails on master or on any tag.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/12805

See merge request !2681

Add "issue" to Close/Reopen buttons for clarity

_Originally opened by @andywgrant at !2884_

---

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/13549

See merge request !2929