bui = Class.new(moreDirectorsButton.getUI.class) do
  def paintText(graphics, button, rect, text)
    super
    fm = graphics.fontMetrics
    x = rect.x + getTextShiftOffset
    y = rect.y + fm.ascent + fm.descent + getTextShiftOffset - 1
    graphics.drawLine(x, y, x + rect.width - 1, y)
  end
end.new
moreDirectorsButton.setUI(bui)