void MasterCatalogModel::deleteObject(const QString &id)
{
    bool ok;
    quint64 objid = id.toULongLong(&ok);
    Resource resource = mastercatalog()->id2Resource(objid);
    IIlwisObject obj;
    obj.prepare(resource);
    if ( !obj.isValid())
        return;
    obj->remove();
}