message: Use `rect().center()` to shorten code further
diff: @@ -184,7 +184,7 @@ void Button::draw()
  if (mImage)
  {
  - r.drawImage(*mImage, rect().startPoint() + (rect().size() - mImage->size()) / 2);
  + r.drawImage(*mImage, rect().center() - mImage->size() / 2);
  }
  else
  {
  