see QTBUG-107139

Loading of otf font with addApplicationFont succeeds with result of 0, but actually using it does not work.

example code:

    int id = QFontDatabase::addApplicationFont(":/Fonts/NotoSansTC-Regular.otf");
    qWarning() << "RESULT" << id;
    QString family = QFontDatabase::applicationFontFamilies(id).at(0);
    QFont NoToSans(family);

    ui->lineEdit->setFont(NoToSans);