Fix JoinGroupchat hotkey if zeroconf is active

gajim/roster_window.py

@@ -5521,8 +5521,9 @@ class RosterWindow:
         """
         # find a connected account:
         for account in app.connections:
+            if account == 'Local':
+                continue
             if app.account_is_connected(account):
-                break
                 self.on_join_gc_activate(None, account)
         return True