wxOSX Retina fixes: size wxStaticBitmap and wxBitmapButton properly.

The size is expressed in logical coordinates and needs to use bitmap's
scaled size, otherwise it would appear twice as large in both
dimensions.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75350 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/ctrlcmn.cpp

@@ -584,7 +584,7 @@ wxSize wxStaticBitmapBase::DoGetBestSize() const
     wxSize best;
     wxBitmap bmp = GetBitmap();
     if ( bmp.IsOk() )
-        best = wxSize(bmp.GetWidth(), bmp.GetHeight());
+        best = bmp.GetScaledSize();
     else
         // this is completely arbitrary
         best = wxSize(16, 16);