Container Registry refactor docs

From https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6516

See merge request !790

[ci skip]

Closes https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1433

[ci skip]

Fix validations related to mirroring settings form.

Some of our users are changing to GitLab as their main repository, it
means that they're disabling the local mirror and setting up a remote
mirror instead. This fix helps to avoid the extra steps required in order
to achieve the desired configuration.

Closes: gitlab-com/support-forum#1044 gitlab-org/gitlab-ee#1062

Related: gitlab-org/gitlab-ce#17940

Also the UI has been modify to have a single update button:

#### Before
![1](/uploads/83c1d614a35911740154d4167f77f6a0/1.png)

#### After

![2](/uploads/87f73a32c35d7fe83558932cdc1a21d7/2.png)

See merge request !773

Fix dead link in docs README

Repository size limit docs were introduced by
https://gitlab.com/gitlab-org/gitlab-ee/commit/9cd2f585b0ddd74de01256d9b247245a44eaa49f

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/23076

See merge request !787

Repository size limit docs were introduced by
https://gitlab.com/gitlab-org/gitlab-ee/commit/9cd2f585b0ddd74de01256d9b247245a44eaa49f

[ci skip]

CE->EE merge before 8.13.0-rc1

Conflicts resolved in the first merge:

```
UU app/models/group.rb
UU app/models/member.rb
UU app/models/project_team.rb
UU app/services/merge_requests/update_service.rb
UU app/services/notification_service.rb
UU app/views/shared/_sort_dropdown.html.haml
UU doc/api/oauth2.md
UU lib/api/members.rb
UU spec/models/merge_request_spec.rb
AA spec/views/ci/lints/show.html.haml_spec.rb
UU app/views/projects/commits/_head.html.haml
```

Conflicts resolved in the second merge:

```
UU app/assets/javascripts/groups_select.js
UU app/assets/javascripts/labels_select.js
UU app/controllers/concerns/membership_actions.rb
UU app/controllers/groups/group_members_controller.rb
UU app/helpers/selects_helper.rb
UU app/views/admin/dashboard/index.html.haml
UU app/views/shared/issuable/_form.html.haml
UU app/views/shared/issuable/_label_dropdown.html.haml
UU app/views/shared/issuable/_sidebar.html.haml
UU config/routes.rb
UU spec/services/merge_requests/merge_service_spec.rb
UU spec/services/system_note_service_spec.rb
```

See merge request !772

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

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

Remove duplicate integration entry

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/23028

See merge request !783

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/23028

[ci skip]

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

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

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

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

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

Don't allow flay to fail.

It's passing now so there's no reason to have it set to allow failure anymore.

See merge request !6707

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

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

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

Some of our users are changing to GitLab as their main repository, it
means that they're disabling the local mirror and setting up a remote
mirror instead. This fix helps to avoid the extra steps required in order
to achieve the desired configuration.

Prevent flash alert text from being obscured when container is fluid

## What does this MR do?

Fixes [a regression](https://gitlab.com/gitlab-org/gitlab-ce/commit/a2af7790) that causes the text within server-initiated flash *alerts* (not flash *notices*) to be obscured when `.container-fluid` is applied. It was reported in relation to a cherry-picking flash alert, but the problem occurs with all server-initiated flash alerts contained by a fluid container. 

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

Note that as part of this fix, I combined some duplicate code and removed `.flash-text` & `.content-wrapper` selectors as they didn't seem to be necessary.
 
I manually tested JS-initiated Flash alerts to make sure this doesn't affect their appearance. I also grepped around for anything else that might depend on these styles. Everything checked out. But... can *you* see something this is going to break?

## Why was this MR needed?

Affected users can't read flash alerts.

## Screenshots (if relevant)

Before:
![Screen_Shot_2016-10-05_at_3.02.38_PM](/uploads/af258585e428d82dc2b293434661790b/Screen_Shot_2016-10-05_at_3.02.38_PM.png)

After:
![Screen_Shot_2016-10-05_at_3.02.47_PM](/uploads/75a93235440e2b83088e66bbe53d6cee/Screen_Shot_2016-10-05_at_3.02.47_PM.png)

JS-initiated flash alert (unaffected):
![Screen_Shot_2016-10-05_at_3.39.57_PM](/uploads/ba678cfaeb09c639499059712a33abe8/Screen_Shot_2016-10-05_at_3.39.57_PM.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
  - [ ] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [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)

## What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ce/issues/22915

cc: @jschatz1 

See merge request !6694

Updated issuable form with GL dropdowns

## What does this MR do?

This adds back in the GL dropdowns into the issuable form but fixes a lot of usability issues & bugs.

## What are the relevant issue numbers?

Closes #19879, #19882, #19881, #19883, #19880 

## Screenshots (if relevant)

![Screen_Shot_2016-08-30_at_12.13.09](/uploads/f1df758b3fb59958b4e6b62960b81bfb/Screen_Shot_2016-08-30_at_12.13.09.png)

![Screen_Shot_2016-08-30_at_12.13.13](/uploads/6e4fd8f4d874b14eaab6b10752a19df4/Screen_Shot_2016-08-30_at_12.13.13.png)


See merge request !5293

fix group links 404

### What does this MR do?
This MR should fix the 404 page, when creating a new group links without selecting any group from the group dropdown list.

### What are the relevant issue numbers?
Closes #20766

See merge request !6155

Correctly parse the date of artifact expiring

## What does this MR do?

Previously the JS was just replacing `-` with `/` however this was breaking when there is a timezone offset.

## What are the relevant issue numbers?

Closes #19600

See merge request !6697

Cleanup config/routes.rb even further by extracting more routes into separate files

Next step after https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6692

See merge request !6698

# Conflicts:
#	app/assets/javascripts/dispatcher.js

See !6474.

added 245px max height and overflow scroll-y to .grouped-pipeline-dropdown

## What does this MR do?
It restricts the sub builds popup in the pipeline graph and makes it scrollable

## Are there points in the code the reviewer needs to double check?
none that I know of

## Why was this MR needed?
To restrict crazy CI configurations from messing with the viewport scrolling.

## Screenshots (if relevant)
![2016-10-05_16.29.35](/uploads/0ce1d8e4d46ec45e181919dd968a80cf/2016-10-05_16.29.35.gif)

## 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
- [ ] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] 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)

## What are the relevant issue numbers?

Closes #22295

See merge request !6696

19499 Update project dropdowns

## What does this MR do?
Separates dropdowns on project homepage and makes caret icon consistent.

## Screenshots (if relevant)

Before:
![Screen_Shot_2016-10-04_at_6.20.27_PM](/uploads/76823e3836db43a60cfcabd67940659f/Screen_Shot_2016-10-04_at_6.20.27_PM.png)

After:
![Screen_Shot_2016-10-04_at_6.19.52_PM](/uploads/164e40e1788b1d6a8aed29ab3348370a/Screen_Shot_2016-10-04_at_6.19.52_PM.png)

## 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 [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [ ] 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)

## What are the relevant issue numbers?
Closes #19499

See merge request !6687

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Refactor TrendingProjectsFinder to support caching

## What does this MR do?

This refactors `TrendingProjectsFinder` so it can support caching of the data. See cb7d398972d786ba7133418266fa34ae641b2497 for more details.

## Why was this MR needed?

Trending projects is quite slow, easily taking seconds to load the entire page.

https://gitlab.com/gitlab-org/gitlab-ce/issues/22164

https://gitlab.com/gitlab-com/infrastructure/milestones/4, in particular the section "Trending page under 2s"

See merge request !6672

Previously it was just replacing dashes which would remove the timezone offset causing the date to be invalid

Closes #19600