Merge branch 'master' into feature/gb/manual-actions-protected-branches-permissions

* master: (641 commits)
  Revert "Fix registry for projects with uppercases in path"
  Fix registry for projects with uppercases in path
  Move event icons into events_helper
  Reset New branch button when issue state changes
  Add link to environments on kubernetes.md
  Indent system notes on desktop screens
  Improve webpack-dev-server compatibility with non-localhost setups.
  Add changelog entry
  Fix recent searches icon alignment in Safari
  Use preload to avoid Rails using JOIN
  Fix NUMBER_OF_TRUNCATED_DIFF_LINES re-definition error
  Prepare for zero downtime migrations
  Fix filtered search input width for IE
  Fix the `gitlab:gitlab_shell:check` task
  Fixed random failures with Poll spec
  Include CONTRIBUTING.md file when importing .gitlab-ci.yml templates
  Let uses hide verbose output by default
  Separate examples for each other
  Collapse similar sibling scenarios
  Use empty_project for resources that are independent of the repo
  ...

Conflicts:
	app/views/projects/ci/builds/_build.html.haml