Denis V. Dedkov issues

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                                            Denis V. Dedkov

Fix application crashes when page with QZXing closes

Sometimes, when page with active scanner closes, QZXingFilter is still processing frame but that frame has already been removed with QVideoSink. So, application may be crashed. Qt::QueuedConnection fixes this problem.

Fix freezes for QZXing on Android with Qt 6.5

Workaround for [QTBUG-97789](https://bugreports.qt.io/browse/QTBUG-97789) might cause extreamly freezes when scanning codes on some devices. Freezes are caused by calling map() method of QVideoFrame object. However, in Qt 6.5.0, the problem described...