miscellaneous LnF improvements, including support for Vista-style (patch 1588794)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44735 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/bmpcboxg.cpp

@@ -380,7 +380,8 @@ void wxBitmapComboBox::OnDrawBackground(wxDC& dc,
 {
     if ( GetCustomPaintWidth() == 0 ||
          !(flags & wxODCB_PAINTING_SELECTED) ||
-         item < 0 )
+         item < 0 ||
+         ( (flags & wxODCB_PAINTING_CONTROL) && (GetInternalFlags() & wxCC_FULL_BUTTON)) )
     {
         wxOwnerDrawnComboBox::OnDrawBackground(dc, rect, item, flags);
         return;