Turn Group#owners into a has_many association
## What does this MR do?
This turns the regular method `Group#owners` into a `has_many` association.
## Are there points in the code the reviewer needs to double check?
As far as I can tell there's no way to do this without using an intermediate association, but perhaps I'm missing something. The reason an intermediate association is needed is because the supplied Proc is applied to the _final_ association (the one returning users), this means that when using a single `has_many` you can't filter out any intermediate rows (e.g. group members).
## Why was this MR needed?
This code being a regular method would prevent eager loading of the owners of a Group, turning it into a `has_many` association resolves this problem. This was discovered in !4410.
## What are the relevant issue numbers?
None.
## 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
- [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 !4676
Pinned sidebar navigation option
## What does this MR do?
Gives the ability to pin the sidebar navigation. Pinning is only possible on screens with above `lg` which is `1200px` if not it reverts to being hidden by default.
## What are the relevant issue numbers?
Closes#18542
## Screenshots (if relevant)
### Un-pinned

### Pinned

See merge request !4683
Improve usability for prioritized labels
## What does this MR do?
- Adds an icon next to prioritized label rows serving as a hint to the user that the labels can be sorted by dragging them.
- Adds description about prioritized labels.
- Restores empty message when removing all prioritized labels.
## Screenshots (if relevant)

Closes#18575
See merge request !4652
Fix long commit message scroll issue.
Fixes horizontal scrollbar for long commit description.
## Before

## After

See merge request !4643
added hover state to top nav links
## What does this MR do?
Adds hover state to top nav links.
## Are there points in the code the reviewer needs to double check?
Ney.
## Why was this MR needed?
UX.
## What are the relevant issue numbers?
Closes#18301.
## Screenshots (if relevant)

See merge request !4521
Replace raphael-rails with raphael.js and split it from the rest of the JS
## What does this MR do?
Removes raphael.js and its related libraries from the default JS bundle.
It also removes raphael-rails because the gem is unmaintained and – for whatever reason – didn't want to cooperate with the way I was trying to require it.
This brings the default (compressed and minified) application.js from 354KB after the d3 MR (!4394) down to 324KB.
## Are there points in the code the reviewer needs to double check?
That tests pass and that there aren't errors on any pages (especially the Network page).
## Why was this MR needed?
It's only used on the Network page and was using way too much bandwidth for just one page.
## What are the relevant issue numbers?
#14372#13165
Follow-up to !4394 and !4516.
cc: @jschatz1
See merge request !4519
Show categorised search queries in the search autocomplete
Fixes#5885
It works in 3 categories, Dashboard, Groups and Project.
## Dashboard context

## Group context

## Project context

## Screencast

See merge request !4499
Due date can be removed from milestones
## What does this MR do?
Adds a button to milestone form to allow user to remove due date
## What are the relevant issue numbers?
Closes#15063
## Screenshots (if relevant)

See merge request !4428
Fixed issue with bold in issuable sidebar
## What does this MR do?
~~The sidebar contained both normal font weight & bold font weight, so this standardises them to bold.~~
After looking at the designs, i've updated the font weights & colors throughout the sidebar to correctly match them
## Screenshots (if relevant)

See merge request !4398
Add shortcut to copy file content hash link
## What does this MR do?
* Allows for multiple shortcut handlers to be initialised
* Adds `y` shortcut to file pages to copy permalink URL.
## Are there points in the code the reviewer needs to double check?
Ney.
## Why was this MR needed?
UX
## What are the relevant issue numbers?
Closes#14470.
## Screenshots (if relevant)

See merge request !4496
New issue shortcut doesnt work on some pages
## What does this MR do?
1. Slightly tidies dispatcher switch case by utilising 'fall through' cases.
2. Adds shortcuts to project pipelines, milestones, builds and forks pages
## Are there points in the code the reviewer needs to double check?
I have a feeling that these may have been missed out of the case statements on purpose?
## Why was this MR needed?
Possible UX issue highlighted in #17929.
## What are the relevant issue numbers?
Closes#17929.
Closes#12616. (dup)
Closes#18123. (dup)
Closes#13688. (dup)
## Screenshots (if relevant)
See merge request !4393
Resolve "Change admin navigation to match new UI"
## What does this MR do?
Moves admin navigation to layout nav to match Project, Groups, and Profile navigation
## Are there points in the code the reviewer needs to double check?
## Why was this MR needed?
## What are the relevant issue numbers?
Closes#18338
## 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 !4650
Prevent default disabled buttons and links.
## What does this MR do?
Prevents default action for disabled buttons and links. If the element has `.btn` and `.disabled` at the same time, its default action will be prevented.
## Are there points in the code the reviewer needs to double check?
Yes. Is there a better way to do that?
## Why was this MR needed?
Right now we can click disabled links and it cause some troubles like in #18079.
## What are the relevant issue numbers?
Fixes#18079
## Screenshots (if relevant)

## Does this MR meet the acceptance criteria?
- [x] [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
- [x] Tests
- [x] 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 !4658
Show number of processed MRs in milestone page
closes#14025

See merge request !4006
Fixed issue with MR buttons being in a group
## What does this MR do?
Fixes design issue with the buttons in the merge request widget
## Screenshots (if relevant)

See merge request !4562
Check if the Users table has exactly one user limiting the whole set
## What does this MR do?
Limit the query set so about a full scan for all the rows on the users table (only scan to records)
#18225
See merge request !4492
Add support for Docker Registry manifest v1
## What does this MR do?
Adds support for Manifest V1 generated by older versions of Docker (before 1.10).
## What are the relevant issue numbers?
Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/18609
See merge request !4669
Update project star/unstar tooltip
## What does this MR do?
Fixes project toggle star button tooltip to show actual tooltip for its state.
## Are there points in the code the reviewer needs to double check?
No.
## Why was this MR needed?
- When you star a project tooltip wasn't changing.
- When you star a project and refresh the page, tooltip was still showing `Star Project`
## What are the relevant issue numbers?
Fixes#18143
## Screenshots (if relevant)
### Before

### After

## Does this MR meet the acceptance criteria?
- [x] [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
- [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 !4672
Eager load project relations in IssueParser
## What does this MR do?
This changes the ReferenceParser class to eager load various associations. This in turn results in the permissions checking code (e.g. the `Ability` model) to _not_ run dozens if not hundreds of extra SQL queries depending on the amount of references involved (in a single document).
## Are there points in the code the reviewer needs to double check?
No.
## Why was this MR needed?
In !4410 it was revealed a _lot_ of a queries came from the `Ability` model and the code it would call. In many cases this was because the code would simply get a project, then get the owners; or get a group, then get some association of that. Eager loading these associations is a fairly simple solution and greatly cuts down the number of queries.
## What are the relevant issue numbers?
None.
## 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
- [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 !4675
Add environments and deployments
This MR is a continuation of https://gitlab.com/gitlab-org/gitlab-ce/issues/17009.
The current implementation is as follow:
1. We have two new tables: `environments` and `deployments`.
2. We have a new tab: `Environments` under `Pipelines` where you can see all you environments and add a new one.
3. We add a new option to `.gitlab-ci.yml` to track where we should create a deployment for environment.
4. If environment in `.gitlab-ci.yml` is specified it will create a deployment. **If environment does not exist it will be created.** (this got changed)
5. The deployment is always successful and shows the time of the action, in that case a build that presumably should do deployment. In the future we could extend deployment with statuses: success, failure. We could extend deployments with information that this is partial or full deployment.
6. User have to create environments that he will track first.
7. User can remove environments.
8. User can retry/rollback past deployment (in that case we retry past build). The new build when succeeds it will create a new deployment.
9. Currently environment have only one parameter: `name`. In the future it should have: `variables`, `credentials` and possibly `runners` and maybe other resources.
10. Currently deployment have this parameters: `sha`, `ref`, `deployable (in this case a build)`, `user (who triggered a deployment)`, `created_at`.
The `.gitlab-ci.yml`:
```
deploy to production:
stage: deploy
script: dpl travis...
environment: production
```
What needs to be done:
- [x] Write initial implementation
- [x] Improve implementation (@ayufan)
- [x] Write tests (@ayufan)
- [x] Improve UX of the forms (cc @markpundsack) - reviewed by @markpundsack
- [x] Improve implementation of the views (cc @jschatz1) - done by @iamphill
- [x] Write .gitlab-ci.yml documentation for `environments` - done by @ayufan
- [ ] Write user documentation (@ayufan and @markpundsack)
See merge request !4605