def help_toggled(self, flag):
        """Show or hide the help tab in the stacked widget.

        :param flag: Flag indicating whether help should be shown or hidden.
        :type flag: bool
        """
        if flag:
            self.help_button.setText(self.tr('Hide Help'))
            self.show_help()
        else:
            self.help_button.setText(self.tr('Show Help'))
            self.hide_help()
Show or hide the help tab in the stacked widget.

        :param flag: Flag indicating whether help should be shown or hidden.
        :type flag: bool