Remove deprecated QMutex usage
This constructor is not available in Qt6 https://doc.qt.io/qt-5/qmutex.html#QMutex-1
Using QRecursiveMutex
instead
This constructor is not available in Qt6 https://doc.qt.io/qt-5/qmutex.html#QMutex-1
Using QRecursiveMutex
instead