message: Emit fewer events when resizing both dimensions of ComboBox
diff: #include <NAS2D/Utility.h>
  #include <NAS2D/MathUtils.h>
  +#include <algorithm>
  +
  +
  using namespace NAS2D;
  /**
  @@ -58,8 +61,11 @@ void ComboBox::init()
  */
  void ComboBox::resizedHandler(Control* /*control*/)
  {
  - if (height() < 20) { height(20); } // enforce minimum height;
  - if (width() < 50) { width(50); } // enforce mininum width;
  + // Enforce minimum size
  + if (mRect.width < 50 || mRect.height < 20)
  + {
  + size({std::max(mRect.width, 50), std::max(mRect.height, 20)});
  + }
  txtField.size(size() - NAS2D::Vector{20, 0});
  btnDown.position(txtField.rect().crossXPoint());
  