qwindowcapturebackend: Check framerate is kept when switching window


Pick-to: 6.12
Change-Id: Ib7b5106adf5eae2d6eed656da14eb9a071719a0c
Reviewed-by: Tim Blechmann <tim.blechmann@qt.io>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>
commit91ab1c3a73e28cfbc550485d3423958743ea5445
parent316df624a55da48e16f84534e95e13992863317e
authorNils Petter Skålerud <nils.petter.skalerud@qt.io>
committerNils Petter Skålerud <nils.petter.skalerud@qt.io>
commit timeFri, 16 Oct 2026 14:37:05 +0000