Implement choices for GtkFileChooserNativeWin32

Fixes #1982 (closed)

System specific documentation:
MSDN:
https://docs.microsoft.com/en-us/windows/win32/shell/common-file-dialog#customizing-the-dialog
https://docs.microsoft.com/en-us/windows/win32/api/shobjidl_core/nn-shobjidl_core-ifiledialogcustomize

Probably the most descriptive documentation on the subject is this:
https://www.codeproject.com/Articles/16678/Vista-Goodies-in-C-Using-the-New-Vista-File-Dialog#customization