QuickFrontend, Primitivus, Wix: special entities management:

- MUC rooms are special entities
	- Primitivus: special entities are shown at the top of the contacts list above a divider,
	 		      presence updates are temporary ignored for them

frontends/src/quick_frontend/quick_app.py

@@ -285,6 +285,7 @@ class QuickApp():
         self.chat_wins[room_jid].setType("group")
         self.chat_wins[room_jid].id = room_jid
         self.chat_wins[room_jid].setPresents(list(set([user_nick]+room_nicks)))
+        self.contact_list.setSpecial(JID(room_jid), "MUC")
 
 
     def roomUserJoined(self, room_jid, user_nick, user_data, profile):