when someone gets kicked we should close the GC tab
\<message from='gajim@conference.jabber.org' to='psybases@jabber.org/Gajim' type='normal'>\<body>You have been kicked from the room gajim@conference.jabber.org. \n Reason: None given\</body>\<x xmlns='http://jabber.org/protocol/muc#user'>\<status code='307'/>\</x>\</message>
either we show this message in an INFORMATION DIALOG and close the tab, or we try to fix the problem where noonline in listed in the MUC list after that [eg. like the rejoining pb we had]