Custom Controls in File Dialogs in 3.2.0

One long-standing problem in wxMSW was that, until now, we were still using old-style Windows file dialogs that looked out of place under modern Windows versions in some cases. To be more precise, wxFileDialog switched to using the old-looking dialog when its SetExtraControlCreator() function was called to add some custom controls to it, resulting in dialogs like this: This will finally be fixed in wxWidgets 3.2.0 where the same dialogs now looks as expected: provided the new SetCustomizeHook() function is