Bug 28762: add staff item-status.inc and better handle statues on course-details.tt

Bug 28762: add staff item-status.inc and better handle statues on course-details.tt

This patch adds an item-status.inc to the staff side much like what is already in place on the OPAC.

To test:
1. create a course in course reserves, add an item to it.
2. confirm your item shows Available for its status on course-details.pl
3. edit your item to be withdrawn, lost, damaged, notforloan, and restricted use
4. reload course-details.pl, confirm it still shows available
5. apply patch
6. repeat step 3 with each of the statuses and make sure it correctly shows on course-details.pl

Signed-off-by: Hayley Pelham <hayleypelham@catalyst.net.nz>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 38427cc357de46d60114ca308329c89f3220a9dd)
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>