Cancelling a request can lead to wrong status if the pickup location has been changed

[PascalRepond]

Bug description:

If I change the "pickup location" of a request right before cancelling it, the loan and item statuses can be incorrect.

Expected behavior:

When cancelling a loan, the system should take into account the location of the latest "recieve" action (or if there was a "validate") instead of the loan's "pickup location" to determine where an item is and what should be the loan's next status.

Steps to Reproduce:

1. Request an item from Library A to Library B
2. Validate the request in Library A
3. (Recieve the item in Library B)
4. Change the pickup location of the request to Library A (from the item detailed view)
5. Cancel the request -> The item becomes "on shelf" but the loan should be "in transit to house"