def set_right_margin(self, right_margin):
        """
        Set the right margin of the menu.  This will determine the number of spaces between the right edge of the
        screen and the right menu border.
        :param right_margin: an integer value
        """
        self.__header.style.margins.right = right_margin
        self.__prologue.style.margins.right = right_margin
        self.__items_section.style.margins.right = right_margin
        self.__epilogue.style.margins.right = right_margin
        self.__footer.style.margins.right = right_margin
        self.__prompt.style.margins.right = right_margin
        return self
Set the right margin of the menu.  This will determine the number of spaces between the right edge of the
        screen and the right menu border.
        :param right_margin: an integer value