LP#1846042: turn on grid filtering for Angular admin pages

LP#1846042: turn on grid filtering for Angular admin pages

This WIP patch enables grid filters for Angular administration
pages.

TODO:

1. Enable for pages that override or do not use the default
   AdminPageComponent
2. Reconcile with the gridFilter URL parameter that booking
   (e.g.) uses.
3. Reconcile the top-level org unit filter widget with
   grid column org unit filters.

Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>
Signed-off-by: Jeff Davis <jdavis@sitka.bclibraries.ca>
Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Michele Morgan <mmorgan@noblenet.org>