* master: (313 commits)
  Introduce maximum session time for terminal websocket connection
  add CHANGELOG entry for !8988
  transpile all javascript files with babel
  add npm run webpack command
  lazy-load ace config so that we can ensure window.gon exists
  fix ace editor modules to include asset digest in production
  Ensure the right content is served for the build artifacts API
  Add index to labels for `type` and project_id`
  fix rack-proxy dependency in production
  Fixed typo
  fix failing test
  fix Vue warnings for missing element
  [ci skip] UX Guide: Button placement in groups
  Change window size before visiting page, to get correct scroll position
  Fix slash commands spec error
  Move project services to new location under Integrations
  Move webhooks to new a location under Integrations
  Fixed eslint test failure
  Fixed adding to list bug
  Remove unnecessary queries for .atom and .json in Dashboard::ProjectsController#index
  ...