[schema, old instance] restore some pre 3.5.10 bw compat as some old instances may still have this, and add migration so we can remove it at some point
Latest changes --------------* table of `all latest changes`_Links below is providing useful RQL query example..._all latest changes: view?rql=Any+M%2CX+WHERE+X+modification_date+M+ORDERBY+M+DESC+LIMIT+30