message: Use ternary to simplify `changeValue` calls
diff: @@ -190,13 +190,11 @@ void Slider::onMouseUp(EventHandler::MouseButton button, int x, int y)
  {
  if (mSliderType == SliderType::Vertical)
  {
  - if (y < mSlider.y) { changeValue(-3); }
  - else { changeValue(3); }
  + changeValue((y < mSlider.y ? -3 : 3));
  }
  else
  {
  - if (x < mSlider.x) { changeValue(-3); }
  - else { changeValue(3); }
  + changeValue((x < mSlider.x ? -3 : 3));
  }
  }
  }
  