def remove_all_callbacks(self):
        """
        Remove all callbacks registered to the shortcut manager
        :return:
        """
        for action in self.registered_shortcut_callbacks.keys():
            for callback in self.registered_shortcut_callbacks[action]:
                self.shortcut_manager.remove_callback_for_action(action, callback)
        # delete all registered shortcut callbacks
        self.registered_shortcut_callbacks = {}