Earlier plop feedback

piket_client/gui.py

     def process_click(self) -> None:
         """ Process a click on this button. """
         if self.person.add_consumption(self.active_id):
-            self.setText(self.current_label)
             plop()
+            self.setText(self.current_label)
         else:
             print("Jantoeternuitje, kapot")