Only show register tab if signup enabled.

## What does this MR do?

Fixes a regression where the register tab is activated, even if sign-up enabled is not activated in application_settings.

## Screenshots (if relevant)

When signup is disabled: 

![Screen_Shot_2016-10-22_at_8.56.23_PM](/uploads/bd0fa5f27114779c0d290a8151c1c253/Screen_Shot_2016-10-22_at_8.56.23_PM.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) entry added
- [ ] 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 it does - 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/23654

See merge request !7058

Enable SpaceAfterVariableColon in scss-lint

## What does this MR do?
Enables `SpaceAfterVariableColon` in `.scss-lint.yml`

## Are there points in the code the reviewer needs to double check?
None

## Why was this MR needed?
Improve SCSS maintainability and consistency

## Screenshots (if relevant)
None

## Does this MR meet the acceptance criteria?

- Tests
  - [x] 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 it does - 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?
#23485

See merge request !7080

Enable SpaceAroundOperator in scss-lint

## What does this MR do?
Enables `SpaceAroundOperator` in .`scss-lint.yml`

## Are there points in the code the reviewer needs to double check?
None

## Why was this MR needed?
Improve SCSS maintainability and consistency

## Screenshots (if relevant)
None

## Does this MR meet the acceptance criteria?

- Tests
  - [x] 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 it does - 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?
#23485

See merge request !7078

Enable trailingWhitespace in scss-lint

## What does this MR do?
Enables `trailingWhitespace` in `.scss-lint.yml`

## Are there points in the code the reviewer needs to double check?
None

## Why was this MR needed?
Improve SCSS maintainability and consistency

## Screenshots (if relevant)
None

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) entry added
- Tests
  - [x] 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 it does - 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?
#23485 

See merge request !7077

Fix pipeline graph hidden on commit and mr pages

## What does this MR do?

Dynamically invokes `new gl.Pipelines();` when an MR `builds` tab is clicked.

Dispatches `new gl.Pipelines();` on a `commit#builds` page.

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

## Why was this MR needed?

The pipeline graph was hidden on commit and mr pages

## Screenshots (if relevant)

Commit page:
![Screen_Shot_2016-10-14_at_18.16.18](/uploads/ee11dea0825d1489dc167292e16c8f41/Screen_Shot_2016-10-14_at_18.16.18.png)

MR:
![Screen_Shot_2016-10-14_at_18.16.39](/uploads/602c2fce2397c799bedb757bfd3010af/Screen_Shot_2016-10-14_at_18.16.39.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 it does - 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 #23325

See merge request !6895

Resolve "Build sidebar has extra space on Firefox"

## What does this MR do?

Accounts for the deprecated use of `document.body.scrollTop` on FF that was breaking the `translateSidebar` method.

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

## Why was this MR needed?

## Screenshots (if relevant)

![2016-10-22_23.16.31](/uploads/496810a9bb4fa4c3762023ff175572cb/2016-10-22_23.16.31.gif)

## Does this MR meet the acceptance criteria?

- [ ] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) 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 it does - 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 #23665

See merge request !7060

invoked the pipelines class when builds are dynamically loaded and dispatched for commit builds page

Fixes #23575

See merge request !7037

Grapify the labels API

Add the Grape-DSL to the labels API. Since the input validation messages are checked, two tests are modified slightly.

## What are the relevant issue numbers?

Related to #22928

See merge request !7070

Fix sign in page Forgot your password link overlap

## What does this MR do?
Fix Sign in page 'Forgot your password?' link overlaping on medium-large screens 

## Why was this MR needed?
Overlapping text as per #23630 

## Screenshots (if relevant)
![sign-in-page](/uploads/a94084297e447fe58f0af6f199e74248/sign-in-page.png)

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG.md) 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 [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 it does - 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?
#23630

See merge request !7059

Grapify builds API

## What does this MR do?

Add the Grape-DSL to the builds API.

## What are the relevant issue numbers?

Related to #22928 

The artifacts API directly downloads a file rather then returning a JSON entity.

See merge request !6877

Fix old monitoring links to point to the new location

See merge request !7075

Fixes #23575.

Add an example of how to run the backups when using docker to the docs

## What are the relevant issue numbers?

https://gitlab.com/gitlab-org/omnibus-gitlab/issues/1616

See merge request !7046

See merge request !4814.

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

fixes build with cache:clear issue

## What does this MR do?
Fixes a build issue that was probably introduced in commit 0c0caede.

See merge request !7074

Check that user has access to a given namespace to prevent leaking namespace names.

See merge request !2009

See merge request !6544.

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

Merge request - https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6979

Fix branch protection API.

## What does this MR do?

- Fixes the branch protection API.
- Closes #21513 
- EE Merge Request: gitlab-org/gitlab-ee!718

## Tasks

- [ ]  #21513 !6215 Protected branches API bug
    - [x]  Investigate
    - [x]  Test + Fix
    - [x]  Changelog
    - [x]  MR
    - [x]  Wait for build to pass
    - [x]  Review
    - [x]  Check for EE conflicts
    - [x]  Create EE MR
    - [x]  Refactor + Fix
    - [x]  Rebase EE MR against EE master
    - [x]  Wait for builds to pass
    - [x]  Assign to dbalexandre/douwe
    - [x]  Implement latest review comments
    - [x]  Wait for Douwe's review
        - [x]  Implement changes
        - [x]  Port changes to EE MR
        - [x]  Assign both back to Douwe
    - [ ]  Wait for merge
    - [ ]  Merge gitlab-org/gitlab-ee!718

See merge request !6215

Fix constrainers for relative url

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/23675

See merge request !7071

Use root_url for issue boards user link

## What does this MR do?

Rather than using `/` as the root path, it now correctly sends the root URL from Rails to prevent errors with installations in subdirectories. 

## What are the relevant issue numbers?

Closes #23556

See merge request !7018

This MR removes AR before_validation callback in favor setter.

## Why was this MR needed?

Because setters is good practice to normalize model attributes instead AR callbacks. Because new object should be valid right after initialization. 
If it MR interested I can try to find other places where we can use setters.

See merge request !6763