Windows: Destroy display change window before unregistering window classHEADdev

The QWindowsScreenManager's m_displayChangeObserver window would still
be alive at the time ~QWindowsContext would unregister window classes,
resulting in a warning that was hidden by the default verbosity of
QWindowsContext::verbose. The result was that we would get a warning
when then trying to re-register the already registered window class.

We now do what we do for m_powerNotification and m_powerDummyWindow,
which is to destroy them explicitly before unregistering their class.

Fixes: QTBUG-125058
Pick-to: 6.7 6.5
Change-Id: Id3b02237fdd81f734a58a2314a157cad1289a82c
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

0 files changed, 0 insertions, 0 deletions