Moc does not natively support Q_OBJECT in template specialization

If you try to add Q_OBJECT and Q_SIGNAL in a template specialization class, MOC does not generate meta code and silently fails.

QObject meta code symbols will be not found by the compiler.

A workaround is to define a type for the template specialization (with using or typedef) and to replace the class declaration with the explicit type only with the macro Q_MOC_RUN.