Fix a bug with changing status in groupchats. Always print "You are now %s" in groupchats, even if you change from "action menu".

introduce a FakeDataForm class that draws a table from dict {entry: value} and use it for service registration

--Cette ligne, et les suivantes ci-dessous,
seront ignorées--

M    src/groupchat_control.py

in tabs.

handle correctly vcards in groupchats : ask them to real jid if we know it, but considere it arrive from fake jid. Fixes #3172, #3173