Qt 6.8.1 ignores QMenu activation via injected QEvents

Activating menu items for automation purposes by posting QEvents and moving the mouse cursor does not work anymore for Squish in Qt 6.8.1.

The bug was introduced with commit f0758fb1130b64e5acea63bf86e1991b569ea1e5 which was (supposed to be) subsequently picked to 6.7, 6.5 and 6.2.
The problematic change is using QGuiApplicationPrivate::lastCursorPosition instead of QCursor::pos() because the former is not updated in this scenario while the latter is.

Only one line from commit may be reverted to make Squish work again. It is line 2462 in qtbase/src/widgets/widgets/qmenu.cpp:

const QPoint mouse = QGuiApplicationPrivate::lastCursorPosition.toPoint();

Can be changed back to:

QPoint mouse = QCursor::pos();

Ideally Squish should be injecting QWidget replay events via QPA but that would mean vastly different code and behavior depending on the Qt version.