Bug 4912 [REVISED] After editing private list, user should be redirect to private...

Bug 4912 [REVISED] After editing private list, user should be redirect to private lists

As far as I can tell there isn't a redirect in the code which is
triggered in the wake of a ModShelf() action. This patch adds a
redirect which is reflects the context of the original "edit" link.

To test, edit the details of a list in the OPAC from:

- the list of private lists
- the list of public lists
- the contents view of public or private list

After each of these actions you should be redirected back to
the page where you clicked the "edit" link.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>