MenuButton: Avoid event propagation if handled as hotkey

scene/gui/menu_button.cpp

@@ -39,7 +39,8 @@ void MenuButton::_unhandled_key_input(InputEvent p_event) {
 			return;
 
 
-		int item = popup->activate_item_by_event(p_event);
+		if (popup->activate_item_by_accelerator(code))
+			accept_event();
 	}
 }