- "preferred" is being appended because in tile view there is a
  concept of what the user prefers to be the maximum video quality
  but there is also a maximum respected internall. For example,
  the user may prefer HD, but in tile view the tiles may be small
  so internall the preferred would be set to LD.
- "receive" is being renamed to "receiver" to be consistent with
  the naming in lib-jitsi-meet.

Being kicked out of the conference will result with a conference failed
event with 'conference.kicked' reason and take the user back to
the welcome page by navigating to 'undefined'.