code: def toggle_quick_open_command_line_sensitivity(self, chk):
          
          self.get_widget('quick_open_command_line').set_sensitive(chk.get_active())
          self.get_widget('quick_open_in_current_terminal').set_sensitive(chk.get_active())
docs: When the user unchecks 'enable quick open', the command line should be disabled