message: Update Control::position Point overload to be a primary method
diff: @@ -13,7 +13,9 @@ using namespace NAS2D;
  */
  void Control::position(const Point<float>& pos)
  {
  - position(pos.x(), pos.y());
  + const auto displacement = pos - mRect.startPoint();
  + mRect.startPoint(pos);
  + positionChanged(displacement);
  }
  