Bug 27919: (QA follow-up): Add alerts to the UI to show there are return claims

Bug 27919: (QA follow-up): Add alerts to the UI to show there are return claims

This patch adds info to the UI to show when there is a return claim. It also reconciles the behaviour for allowing the lost status to be changed. Previously the lost status could not be changed if there was a return claim. This is now possible and a message is shown highlighting the fact that there is a return claim as well as the new lost status.

Test plan:
1) Add a return claim to an item.
2) Check the holdings table on the record page and observe that the "Status" column now shows that there is a return claim
3) Click on the barcode for that item in the table to get to the item editing page
4) Observe that the select for the item lost status is not disabled
5) Change the status and save - the form should save correctly and display both the new status as well as a message showing that there is a return claim.

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>