Comment 6 for bug 1861701

FWIW, I think this may be an opportunity to provide a staff-oriented interface that deviates a little from how the TPAC does things, especially now that library groups (lassos) are back.

A new dependent selector that just presents location groups and library groups based on the currently selected org unit would avoid complicating the org unit selector component. It could be reasonably populated on-demand in the Angular catalog, where TPAC coding style prevents that and makes the UX harder to manage for multiple dependent dropdowns.