Merge remote-tracking branch 'origin/develop' into disjointed-popovers

* origin/develop: (25 commits)
  force panel headers to be square on mobile (for now?)
  fix gap between panel heading and timeline menu
  Fix Open Chat button
  fix?
  fix
  Revert "Merge branch 'revert-a88abc7e' into 'develop'"
  Revert "Merge branch 'from/develop/tusooa/lang-opts' into 'develop'"
  Fix registration error
  stick chat scroll to bottom to help with OSK resizing the viewport
  Pass file name of cropped avatar to form data
  Add English translation for filtering end-of-poll notifications
  Add settings for filtering end-of-poll notifications
  Add English translations for poll-end notifications
  Show poll-end notifications
  Fix virtual scrolling when the user has a lot of pinned statuses
  Update dependency @vuelidate/core to v2.0.0-alpha.41
  Make lint happy
  Make lint happy
  Add English translation for language options
  Add email language option to registration form
  ...