There's no plumbing in QMessageDialogOptions for supporting
native dialog buttons with menus, and even if there was such
plumbing, we don't know if our native dialogs could support
them.
As a workaround, detect the situation and automatically fall
back to the non-native dialog, so the user doesn't need to
set Qt::AA_DontUseNativeDialogs explicitly.
Fixes: QTBUG-118419
Change-Id: Iece7012909261b8869ce0ca23e45e8daaf4babc7
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
2d59f2e8ca