consistently add Q_OBJECT macro to all sub-clases of PropertyItem
consistently add Q_OBJECT macro to all sub-clases of PropertyItem

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master