Merge remote-tracking branch 'upstream/develop' into translations-separation

* upstream/develop: (21 commits)
  use prime number step for Who to follow panel
  fix
  Revert "Update messages.js"
  Update messages.js Update the Occitan language - Fixed Linting
  remove formatting options
  Remove outdated settings
  features panel i18n
  features panes supports chat & gopher
  fix collapse link being too small
  small fix for non-square gif avatars
  Fixed collapseMessageWithSubjectLocal always using instance-provided config.
  Fix last place with usercard having wrong width
  Fixed non-masked image looking weird in chrome.
  Kinda went back to using align-items: stretch. Fixed error message floating.
  Simplified image sensitivity label
  show features panel only if not login
  update
  debug
  update
  debug
  ...