The logical DPI reported to applications is the platform screen
logical DPI divided by the platform screen scale factor.
Use the screen in question when calculating the DPI instead of
the values from the main screen.
QHighDpiScaling::logicalDpi now takes a QScreen pointer.
Done-with: Friedemann Kleint <Friedemann.Kleint@qt.io>
Task-number: QTBUG-53022
Change-Id: I0f62b5878c37e3488e9a8cc48aef183ff822d0c4
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>