Show org selector for staff

Show org selector if cts.is_staff is true. This is useful for
cataloging.

Signed-off-by: Jeff Godin <jgodin@tadl.org>
Show only certain orgs in org selector

Show only the KCL orgs (and ancestors) in org selector (which itself
is only shown to staff).

Signed-off-by: Jeff Godin <jgodin@tadl.org>