Bug 22652: Editing Course reserves is broken

Bug 22652: Editing Course reserves is broken

To test:
1. Create a course reserve or go on an existing one
2. Add items and add a change for the holdingbranch
3. On the list of items in this course reserve
(course_reserves/course-details.pl?course_id=xx), click on "edit" at the
end of a row :

Without the patch, you can't see the holdingbranch you have choose for
this item, but you see "LEAVE UNCHANGED"

With the patch, you can see the holdingbranch you have choose when
adding this item in the course

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Mikaël Olangcay Brisebois <mikael.olangcay-brisebois@inLibro.com>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit ba14e9ca7d40af664f7079c6a9f85a85e88fca9a)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit 27209dea6666c490431aa56485771d8e36c0125a)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 8fbf85efd2179495cc50e8ec3609c382fc010094)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>