Call QHighDpiScaling::updateHighDpiScaling() in init_plaform(),
after the platform integration has been created and most platforms
have populated the screen list. Keep the existing udpate call for
the platforms that don't, but guard against calling it twice.
Task-number: QTBUG-47947
Change-Id: Ib73bea7c4ab42e7acf6532f3a3100e1fc29acc2c
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>
45bb9c29e8