Bug 16876: Remove Full Heading column from OPAC Auth search results

Bug 16876: Remove Full Heading column from OPAC Auth search results

To test:

1) Go to Authority Search and do a search
2) Notice that there is a Full Heading column that has 'View full
   heading' links. These take up a lot of space and don't mean a lot to
   the user
3) Apply patch and refresh
4) Notice that the the Full Heading column is gone and there is now a
   Details column next to the authorities. Confirm the link takes you to
   the expected authority detail page.

Sponsored-by: Catalyst IT
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit 59d8f3f8617070ec29159ee3c2e0400e9214e4d4)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>