fixes #341

Hide 'Server' Label when hiding server input

tipe email, more mobile firendly

* Make sure that minimized chats appear behind on mobile.
* Enable highlighting text (which for some reason is transparent).

* Prevent "join" being called twice by having more finegrained connection
  status for a chat room.
* The directInvite method used the wrong JID.
* Rename getRoomJID to getRoomJIDAndNick to avoid confusion.

Also added 3 new commands, /member, /revoke, /admin