* master: (367 commits)
  Set “Remove branch” button to default size
  remove unused helper method
  reduce common code even further to satisfy rake flay
  remove button class size alteration from revert and cherry pick links
  factor out common code to satisfy rake flay
  homogenize revert and cherry-pick button styles generated by commits_helper
  apply margin on alert banners only when there is one or more alerts
  Rename MattermostNotificationService back to MattermostService
  Rename SlackNotificationService back to SlackService
  Fix stage and pipeline specs and rubocop offenses
  Added QueryRecorder to test N+1 fix on Milestone#show
  Use gitlab-workhorse 1.2.1
  Make 'unmarked as WIP' message more consistent
  Improve specs for Files API
  Allow unauthenticated access to Repositories Files API GET endpoints
  Add isolated view spec for pipeline stage partial
  Move test for HTML stage endpoint to controller specs
  Fix sizing of avatar circles; add border
  Fix broken test
  Fix broken test Changes after review
  ...

Conflicts:
	app/assets/stylesheets/pages/pipelines.scss
	app/controllers/projects/pipelines_controller.rb
	app/views/projects/pipelines/index.html.haml
	spec/features/projects/pipelines/pipelines_spec.rb