Bug 33621: Fix claim return

Bug 33621: Fix claim return

To test:

1. Set the CaimReturnedLostValue system preference to one of your LOST authorised values
2. Check out an item
3. In the checkouts table, claim return
4. Notice the processing icon keeps spinning
5. Apply the patch
6. Check in the item and resolve the return claim to clear it
7. Check out an item
8. In the checkouts table, claim return
9. Confirm the checkouts table reloads and the return is claimed as expected

Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>