Use case: categorized sorting is enabled, the current view mode is icons-view. When switching to the details-view (which does not support categorized sorting yet), the 'categorized sorting' action should get only disabled to indicate that it is not available, not get unchecked (currently it gets disabled AND unchecked). This patch assures that always the stored categorization state is returned for the menu actions, but internally the categorization is turned off for the proxy model for the details view and column view.