Bug 17561: (follow-up) Pass itemnumber on returns and correct itemnumber param in...

Bug 17561: (follow-up) Pass itemnumber on returns and correct itemnumber param in circulation

To test:
1 - Place two holds on a bib for a single patron
2 - Check in both items, confirm the screen message and slip are correct
3 - Checkout both items to another patron, confirm the screen message
and slip are correct

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>