Fixs:
    * Ignore launched threads when changing room...
    * Sort rooms by last message or fav?

Functionality:
    * Infinite scroll is done, but we need a button at the top, because the
      event is send only if the scroll exists
    * Room search
    * Room creation
    * Leave room
    * Set topic
    * Set room avatar
    * Change user display name
    * Change user avatar
    * Register
    * Show media messages (images / videos)
    * Send media messages (images / videos)
    * Store last read message to show differently

Other stuff:
    * Set the app name correctly to show in the shell topbar

Encription:
    https://matrix.org/docs/guides/e2e_implementation.html