* master: (175 commits)
  Fix typo
  Always use `fixture_file_upload` helper to upload files in tests.
  Add CHANGELOG
  Fix extra spacing in all rgba methods in status file
  Improve spacing and fixes manual status color
  Add `ci-manual` status CSS with darkest gray color
  Move admin application spinach test to rspec
  Move admin deploy keys spinach test to rspec
  Fix CI/CD statuses actions' CSS on pipeline graphs
  Fix rubocop failures
  Store mattermost_url in settings
  Improve Mattermost Session specs
  Ensure the session is destroyed
  Improve session tests
  Setup mattermost session
  Fix link from doc/development/performance.md to 'Performance Monitoring'
  Fix query in Projects::ProjectMembersController to fetch members
  Improve test for sort dropdown on members page
  Fix sort dropdown alignment
  Undo changes on members search button stylesheet
  ...