Bug 13886: Add ability to merge records directly from cataloging search

Bug 13886: Add ability to merge records directly from cataloging search

This patch adds a merge button and checkboxes to the cataloging search results screen to allow librarians to merge directly from these reults

To test:
1 - Apply patch
2 - Perform a cataloging search
3 - Try to select 1 or more than 2 records to merge and check that you get an error
4 - Select 2 records to merge and confirm the correct records are passed to the merge tool

Signed-off-by: Nicole Engard <nengard@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>