Enable/disable file dependent actions
        (only if dockwidget is visible)

def refresh_file_dependent_actions(self):
        """Enable/disable file dependent actions
        (only if dockwidget is visible)"""
        if self.dockwidget and self.dockwidget.isVisible():
            enable = self.get_current_editor() is not None
            for action in self.file_dependent_actions:
                action.setEnabled(enable)