Context selectable parent to add list member via Form in NUX

When adding a new list member via a Form in NUX, it is not currently possible to choose the parent by selecting it from the list in another grid on the worksheet.  This would be similar to the CREATE action in classic dashboards.  While you can prompt the user to select the parent (or hard-code it), in many cases the lists are long and multi-levelled, so this is not practical.  We use this function extensively and it is impeding our ability to leverage NUX.