Closes #15552

Remove not-null constraint on lock_version column if it exists

Closes #21678

See merge request !6118

Check for pipelines when setting page_gutter_class.

## What does this MR do?

Fixes regression issue related to the MR window sliding behind the right sidebar on page refresh. 

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

I'm getting stuck thinking about if/how to test this. Or maybe it just deserves a note somewhere about remembering to update `page_gutter_class` when a new route is added?

## Why was this MR needed?

This regression prevented users from using many features of the MR view.

## What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/21121

## Screenshots (if relevant)

Before: 
![Screen_Shot_2016-08-23_at_11.08.04_AM](/uploads/bad1a83569022a7fc699a978c5abef62/Screen_Shot_2016-08-23_at_11.08.04_AM.png)

After: 
![Screen_Shot_2016-08-23_at_11.07.46_AM](/uploads/6cbcb2f849c68dfc93d8a4b53089b06e/Screen_Shot_2016-08-23_at_11.07.46_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)
- [x] API support 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)

cc: @jschatz1 

See merge request !5952

Added search for all lists on issue boards

## What does this MR do?

Adds a search box to allow the user to search all lists in issue boards rather than just the backlog.

## Screenshots (if relevant)

![Screen_Shot_2016-08-30_at_10.33.15](/uploads/67e96055d60a9b3209ce3831a1980c09/Screen_Shot_2016-08-30_at_10.33.15.png)

![Screen_Shot_2016-08-30_at_10.33.19](/uploads/8d5253b8f2ecf1cf9a69d70be8ccf1f9/Screen_Shot_2016-08-30_at_10.33.19.png)

## What are the relevant issue numbers?

Closes #21139

See merge request !6101

Closes #21678

Added project specific enable/disable setting for LFS

## What does this MR do?

Adds project specific enable/disable setting for LFS

## What are the relevant issue numbers?

Needed for #18092

See merge request !5997

Resize created icon

## What does this MR do?
Resizes `created` SVG

## Why was this MR needed?
Because:
![Screen_Shot_2016-08-30_at_3.33.38_PM](/uploads/c4c987e323b4c9cedeb298f08abbc307/Screen_Shot_2016-08-30_at_3.33.38_PM.png)

Hard-coding in the size into the SVG isn't a great solution, but we've got a bit of technical debt here. All the other icons are sized this way, so for this patch fix I think we should just match it. Ideally we'll have classes directly in the SVG code so we can target all these icons properly, and do all color/sizing through CSS

## Screenshots (if relevant)
![Screen_Shot_2016-08-30_at_3.35.49_PM](/uploads/35cf6372142b45b708b6757ea965c075/Screen_Shot_2016-08-30_at_3.35.49_PM.png)

See merge request !6114

prevent authored awardable thumbs  votes

## What does this MR do?
This MR should prevent users from upvoting or downvoting   issues/merge requests/notes authored by them. 

## What are the relevant issue numbers?
Closes #20913 

See merge request !5841

Fix CHANGELOG

Remove duplicate 8.11.4 entries and mark 8.11.3 as released.

[ci skip]

See merge request !6116