Bug 37409: Fix 'Edit' button for items in course reserves list

Bug 37409: Fix 'Edit' button for items in course reserves list

To test:
1) Set the 'UseCourseReserves' sys pref to 'Use'
2) Go to the Course reserves page
3) Create a new course, fill in the required info and make sure the 'Enabled?' is checked
4) Add a reserve to this course
5) From the course details page, select edit on the reserve you just made.
6) Note it brings you back to the add reserves page, and you are required to enter the barcode/biblionumber again to edit
7) Apply patch, restart_all
8) Press the edit button again
9) Now you are directed towards the correct page for editing
10) Make some changes and press save
11) You should be redirected back to the details page and your changes have been made

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>