Bug 35773: Add manage_bookings subpermission to patron searching
This quickly fixes the issue to allowing those who have the
manage_bookings subpermission to also search for users.
It's deliberately bare as I'm keen to subsequently remove it again in
bug 29509 where we will deal with this properly.
Signed-off-by: David Nind <david@davidnind.com> Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net> Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>