LP1860460 Copy delete override repairs, perm failed handler

LP1860460 Copy delete override repairs, perm failed handler

* Teach the Angular holdings module vol/copy delete dialog to correctly
  report failure events to the user and handle permission overrides.

* Add support for automatically launching the op-change dialog when a
  permission failed event is returned by an API call for any /eg2/staff/
  interface.

Signed-off-by: Bill Erickson <berickxx@gmail.com>
Signed-off-by: Jennifer Weston <jennifer.weston@equinoxinitiative.org>
Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>