[REG 6.5.2 → 6.5.3] QQmlProperty: wrong warning about signal handler capitalization

[W] (default): "onlineStatus" is not a properly capitalized signal handler name. "onLineStatus" would be correct.

        // qqmlproperty.cpp:412
        signalName = QQmlSignalNames::badHandlerNameToSignalName(terminal);
        if (signalName) {
            qWarning()
                    << terminal
                    << "is not a properly capitalized signal handler name."
                    << QQmlSignalNames::signalNameToHandlerName(*signalName)
                    << "would be correct.";
            if (findSignal(*signalName))
                return;
        }