Chat presentation enhancement

- core: message signal is not sent anymore for groupchat type, cause MUC chat server do it for us
- wix: user nick can now be specified to chat windows, usefull for colorization
- memory: full jid are now sent
- wix: message from user are now in black for group chat

frontends/quick_frontend/quick_app.py

@@ -213,6 +213,7 @@ class QuickApp():
             return
         debug (_("Room [%(room_name)s] joined by %(profile)s, users presents:%(users)s") % {'room_name':room_id+'@'+room_service, 'profile': profile, 'users':room_nicks})
         room_jid=room_id+'@'+room_service
+        self.chat_wins[room_jid].setUserNick(user_nick)
         self.chat_wins[room_jid].setType("group")
         self.chat_wins[room_jid].setPresents([user_nick]+room_nicks)