Since we're already using 3 of the 4 enums in PlatformDialogHelper, we
can just as well declare PlatformDialogHelper as extended namespace and
avoid all the fiddling with Q_ENUMS and QFLAGS.
As an additional upside, we get code using those enums to compile to
C++ this way.
Pick-to: 6.5
Fixes: QTBUG-110933
Change-Id: I60bfc15c94133be368fa98ee1b3a0ab7a2bc53ef
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Ulf Hermann