message: Fix up the sliders-simple.qss style.
diff: /* SLIDERS */
  QSlider::groove:horizontal {
  -border: 1px solid transparent;
  +border: 1px solid palette(mid);
  background: palette(alternate-window);
  height: 10px;
  border-radius: 3px;
  }
  QSlider::groove:vertical {
  -border: 1px solid transparent;
  +border: 1px solid palette(mid);
  background: palette(alternate-window);
  width: 10px;
  border-radius: 3px;
  }
  QSlider::sub-page:horizontal {
  background: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 1,
  - stop: 0 palette(highlight), stop: 1 palette(window));
  + stop: 0 transparent, stop: 1 palette(highlight) );
  border: 1px solid transparent;
  height: 10px;
  border-radius: 3px;
  }
  -QSlider::sub-page:vertical {
  +QSlider::add-page:vertical {
  background: qlineargradient(x1: 0, y1: 0, x2: 1, y2: 1,
  - stop: 0 palette(highlight), stop: 1 palette(window));
  + stop: 0 transparent, stop: 1 palette(highlight) );
  border: 1px solid transparent;
  width: 10px;
  border-radius: 3px;
  @@ -31,7 +31,7 @@ border: 1px solid transparent;
  height: 10px;
  border-radius: 3px;
  }
  -QSlider::add-page:vertical{
  +QSlider::sub-page:vertical{
  background: palette(alternate-window);
  border: 1px solid transparent;
  width: 10px;
  @@ -40,13 +40,13 @@ border-radius: 3px;
  QSlider::handle:horizontal{
  background: palette(mid);
  border: 1px solid palette(mid);
  -width: 1em;
  +width: 1ex;
  border-radius: 1px;
  }
  QSlider::handle:vertical{
  background: palette(mid);
  border: 1px solid palette(mid);
  -height: 1em;
  +height: 1ex;
  border-radius: 1px;
  }
  QSlider::handle:horizontal:hover, QSlider::handle:vertical:hover{
  