Merge branch '2018-06-07-RC-cut-ee' into 11-0-stable-ee-prepare-rc6

* 2018-06-07-RC-cut-ee: (270 commits)
  Fix related issues top padding
  Update CHANGELOG.md for 10.8.4
  Update CHANGELOG-EE.md for 10.8.4-ee
  Add CHANGELOG
  Fix index for outdated projects on the project_repository_states table
  Changed the usage of two modal headers
  Fix typo
  Merge branch 'jl-add-eks-integration-docs' into 'master'
  Fix export issues modal
  Port of 43597-new-navigation-themes to EE
  Re-add an important '/' that was inadvertently removed
  Update gitlab flow doc
  Update readme
  add changelog
  fix lock spec
  doc
  policy
  lock permission
  group runners
  change wording
  ...