winrt: Fix launch as background task

In case a background task wants to use Qt, winmain is not invoked.
Neither can we create the same objects like winmain do (as in creating a
application view). Instead runOnXamlThread uses the thread pool enabling
the event loop to run successfully.

Task-number: QTBUG-54396
Change-Id: Ia3ba23ed0fd6cd7d2ed8d43675e88073b9aec8b5
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

0 files changed, 0 insertions, 0 deletions