message: Regroup `mThumbPressed` check to make logic more clear
diff: @@ -203,9 +203,8 @@ void Slider::onMouseUp(EventHandler::MouseButton button, int x, int y)
  void Slider::onMouseMove(int x, int y, int /*dX*/, int /*dY*/)
  {
  if (!enabled() || !visible()) { return; }
  - if (!mThumbPressed) { return; }
  - if (mSlideBar.contains({x, y}))
  + if (mThumbPressed && mSlideBar.contains({x, y}))
  {
  if (mSliderType == SliderType::Vertical)
  {
  