Bug 32445: Fix display of 'not for loan' items in staff

Bug 32445: Fix display of 'not for loan' items in staff

test plan :
1) Edit any item, item type should be for loan, so not set to reference.
2) Set Not for loan status to "not for loan".
3) Go to the staff detail page:
=> Without patch it displays as: Not for loan (Not For Loan) Available
=> With patch it displays as: Not for loan (Not For Loan)

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>