message: Remove no longer used unpacked overload of onMove
diff: @@ -62,10 +62,8 @@ protected:
  /**
  * Called whenever the Control's position is changed.
  *
  - * \param dX Difference in X Position.
  - * \param dY Difference in Y Position.
  + * \param displacement Difference in position.
  */
  - void positionChanged(int dX, int dY) { positionChanged({dX, dY}); }
  virtual void positionChanged(NAS2D::Vector<int> displacement) { mPositionChanged(displacement); }
  virtual void visibilityChanged(bool /*visible*/) {}
  