If using the ExtendsContentIntoTitleBar() method from the Windows App
SDK, the top margin becomes zero. The current approach does not account
for this, since it relies on the AdjustWindowRectExForDpi function.
Do a manual check after and correct if necessary, by comparing the
window and client sizes.
Fixes: QTBUG-113736
Pick-to: 6.6 6.5
Change-Id: I62e0338b3ff7af47f5525dcccd0f9acfe9691819
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
Reviewed-by: Wladimir Leuschner <wladimir.leuschner@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
8dbc482489