Bug 34977: The "Patron Lists" only allows deleting one list at a time

Bug 34977: The "Patron Lists" only allows deleting one list at a time

In the patrons lists, it's only possible to delete on list at a time. This patch add the possibility to select lists and delete them at once.

TEST PLAN
1. Apply the patch.
2. Create at least 2 patron lists (Navigate to Tools > Patron lists > New patron list).
3. Select the lists you want to delete.
4. Click the "Delete selected lists" button.
5. Confirm that the selected lists have been deleted.
6. Ensure that the button cannot be used if no list is selected.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>