Cleans merge request css

* master: (83 commits)
  Broken link fix
  Fix unassign slash command preview
  Make /copy_metadata only handle the first issuable passed
  Allow admins to push to empty repos
  Only show push-to-master authorized users
  Document externally hosted LFS objects
  Add CHANGELOG entry
  Show Runner's description on job's page
  Fix an N+1 for MRs from forks on the MR index page
  Improve documentation of SSRF protection
  Replace find file project spinach tests with RSpec
  Fix docs typo for ci/lint
  [Backport] Burndown chart for group milestone
  Bump lograge to 0.10.0 and remove monkey patch
  Add Capybara debugging methods to docs
  Update CHANGELOG.md for 10.7.1
  Add missing changelog entry
  Resolve "Avatar URLs are wrong when using a CDN path and Object Storage"
  Fix users not seeing labels from private groups when being a member of a child project
  Update doorkeeper for:
  ...

Broken link fix

See merge request gitlab-org/gitlab-ce!18564

Add copy_metadata quick action

Closes #38450

See merge request gitlab-org/gitlab-ce!18497

Fix errors on pushing/editing files on empty repositories

Closes #44618 and #42583

See merge request gitlab-org/gitlab-ce!18462

Add documentation for externally hosted LFS objects

See merge request gitlab-org/gitlab-ce!18508

Resolve "Add some way to mock and spy on default ES modules"

Closes #30998

See merge request gitlab-org/gitlab-ce!18116

Fix unassign slash command preview

See merge request gitlab-org/gitlab-ce!18447

Merge branch '43111-controller-projects-mergerequestscontroller-index-executes-more-than-100-sql-queries' into 'master'

Resolve "Controller Projects::MergeRequestsController#index executes more than 100 SQL queries"

Closes #43111

See merge request gitlab-org/gitlab-ce!18561

Show Runner's description on job's page

See merge request gitlab-org/gitlab-ce!17321

Hide the push to master instructions for users that are not allowed to
do that.

Also hide buttons that would direct them to commit directly in master

API can be used by project owners to disable LFS object verification
that will block pushes that contain LFS pointers but no the objects.

Introduce new ProjectCiCdSettings model with group_runners_enabled

See merge request gitlab-org/gitlab-ce!18144

Improve documentation of SSRF protection

Closes #45057

See merge request gitlab-org/gitlab-ce!18532

Refactor OmniauthCallbacksController to remove duplication

Closes #26559

See merge request gitlab-org/gitlab-ce!16694

Warning when restore fails when data-dir is a moint point

Closes #19309

See merge request gitlab-org/gitlab-ce!18533

Added fuzzy file finder to web IDE

Closes #44841

See merge request gitlab-org/gitlab-ce!18323

Bump lograge to 0.10.0 and remove monkey patch

See merge request gitlab-org/gitlab-ce!18551

Replace find file project spinach tests with RSpec

See merge request gitlab-org/gitlab-ce!18528

[Backport] EE's Burndown chart for group milestone common code

See merge request gitlab-org/gitlab-ce!18511

Expose Deploy Token info as environment variables to CI/CD jobs

Closes #44447

See merge request gitlab-org/gitlab-ce!18414

Fix users not seeing labels from private groups when being a member of a child project

Closes #45463

See merge request gitlab-org/gitlab-ce!18544

Fix docs typo in Validate the .gitlab-ci.yml

Closes #45688

See merge request gitlab-org/gitlab-ce!18552

lograge 0.10.0 contains the `Location` query string fix in
https://github.com/roidrage/lograge/pull/241 among other minor changes:
https://github.com/roidrage/lograge/blob/master/CHANGELOG.md

Add Capybara debugging methods to docs

See merge request gitlab-org/gitlab-ce!18549