Bug 15512 - Minor regression caused by Bug 7369 - warn on deleting item not triggered

Bug 15512 - Minor regression caused by Bug 7369 - warn on deleting item not triggered

To test:
1 - Delete an item using the Action menu
2 - There is a js error and no warning box
3 - Apply patch
4 - Delete an item using the action menu
5 - You should get a confirmation box as expected

Followed test plan, works as expected.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com
(cherry picked from commit 6233c34484b6361b834788d233c099411f5e2e2a)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>