Bug 14529: Allow user to delete lists

Bug 14529: Allow user to delete lists

Bug 13417 allows a librarian to delete any lists if he has the
permission (delete_public_lists).

There is a mismatch in the perm check.
A user can delete a list with the ability to edit (manage) it.

Test plan:
1/ Create a list A with user A
2/ Create a list B with user B
3/ A should be able to manage and delete the list A.
He cans delete B only if he is superlibrarian or has the
delete_public_lists permission.

Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@unc.edu.ar>