Merge remote-tracking branch 'upstream/master' into fix-git-hooks-when-creating-file

* upstream/master: (141 commits)
  Log mv_namespace parameters
  Remove header ids from University docs
  Added test that checks the correct select box is there for the LFS enabled setting.
  Simplify copy on "Create a new list" dropdown in Issue Boards
  Fix `LFS enabled` select box.
  Use Commit#author so we share logic and cache
  Move admin abuse report spinach test to rspec
  fixes non-retina shadow and browser zoom issue
  Use default `closest` if available!
  Adds polyfill for CustomEvent
  Move abuse report spinach test to rspec
  Add support of Chrome/Chromium in requirements.md
  Fixed dragging issues on issue boards
  Grapify the sidekiq metrics API
  Add nested groups support to the routing
  Correctly determine mergeability of MR with no discussions
  API: Add endpoint to delete a group share
  Add a starting date to milestones
  Update ProjectTeam#fetch_members to use project authorizations
  Update ProjectTeam#max_member_access_for_user_ids to use project authorizations
  ...