* master: (139 commits)
  btn-small -> btn-sm
  Merge branch 'fix-application-setting-nil-cache' into 'master'
  no CI replication
  [CE->EE] Resove frontent conflicts
  [CE->EE] Fix wrong resolvation of specs
  [CE->EE] Resolve group routes
  [CE->EE][ci skip] Resolve conflicts
  Resolve conflict in lib/backup/manager.rb
  Resolve conflict in .gitlab-ci.yml
  [CE->EE][ci skip] Resolve conflicts
  [CE->EE][ci skip] resolve frontend conflicts
  Remove `<script>` and `<template>` from CHANGELOG.md
  Simple docs fixes
  Fix button type
  Changes after review
  Removes group_avatar & group_label_subscription from global namespace
  Fix CSS in load more participants
  Fix the description of the new branch created by an issue's new branch button
  Fix a small typo in the delete merged branches documentation
  Moves vue resource docs into a new file. Adds docs regarding handling 204 response
  ...