message: Update `isPointInRect` to `contains` in Button
diff: @@ -109,7 +109,7 @@ void Button::onMouseDown(EventHandler::MouseButton button, int x, int y)
  {
  Point_2d click(x, y);
  - if(isPointInRect(click, rect()))
  + if(rect().contains(click))
  {
  if(mType == BUTTON_NORMAL)
  {
  @@ -137,7 +137,7 @@ void Button::onMouseUp(EventHandler::MouseButton button, int x, int y)
  {
  mState = STATE_NORMAL;
  - if (isPointInRect(click, rect()))
  + if (rect().contains(click))
  {
  mCallback();
  }
  