* 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
