message: Fix display calculation overflowing for large scrollbars
diff: @@ -424,7 +424,8 @@ QRect RDStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *opt,
  slider.setWidth(qMin(slider.width(), sliderSize));
  slider.moveLeft(ret.left() +
  - (scroll->sliderPosition * (ret.width() - slider.width())) / range);
  + (qreal(scroll->sliderPosition) / qreal(range)) *
  + (ret.width() - slider.width()));
  }
  else
  {
  @@ -461,7 +462,8 @@ QRect RDStyle::subControlRect(ComplexControl cc, const QStyleOptionComplex *opt,
  slider.setHeight(qMin(slider.height(), sliderSize));
  slider.moveTop(ret.top() +
  - (scroll->sliderPosition * (ret.height() - slider.height())) / range);
  + (qreal(scroll->sliderPosition) / qreal(range)) *
  + (ret.height() - slider.height()));
  }
  else
  {
  