primitivus: implement "Show offline contacts" parameter (sync with "DISCONNECTED_HIDE" action key)

frontends/src/quick_frontend/quick_app.py

@@ -556,6 +556,8 @@ class QuickApp(object):
             self.profiles[profile]['whoami'] = JID(value)
         elif (namespace, name) == ("Misc", "Watched"):
             self.profiles[profile]['watched'] = value.split()
+        elif (namespace, name) == ('General', C.SHOW_OFFLINE_CONTACTS):
+            self.contact_list.showOfflineContacts(C.bool(value))
 
     def contactDeletedHandler(self, jid, profile):
         target = JID(jid)