Discard the current active preset. Will release any active plugins that could have come from the old preset.

def discard_plugin_preset(self):
        """
        Discard the current active preset. Will release any active plugins that could have come from the old preset.
        """
        if self.has_plugin_preset:
            for name, plugin in list(self._active_plugins.items()):
                if id(plugin) in self._provided_by_preset:
                    self.release_plugin(name)
            self._active_preset.deactivate(self)
        self._active_preset = None