Don't use qMakePair for implementing qHash
QPair is std::pair in Qt6 and hashing std:: types via qHash doesn't really work.
Shamelessly inspired by https://www.kdab.com/how-to-declare-a-qhash-overload/
QPair is std::pair in Qt6 and hashing std:: types via qHash doesn't really work.
Shamelessly inspired by https://www.kdab.com/how-to-declare-a-qhash-overload/