Bug 10829: fix browsing across pages breaks for OPAC bibs-linked-to-authority searches

Bug 10829: fix browsing across pages breaks for OPAC bibs-linked-to-authority searches

Test plan
1. Do an authority search in the OPAC (A search for 'an:49' perhaps..
that should bring up results for authority number 49, hopefully there
are multiple pages of results, if not try again and find one that
gives you multiple pages of results)
2. Click the final result on any page of results (there must be more
results to follow for this to work)
3. Try clicking the 'Next' button in the 'Browse results' pane on
the right of the page.
4. It should take you to the next result in the search list (i.e
the first result from the next page of results) - Double check it is
correct, we found that it was often not.

5. Apply patch and run same process, this time you should get the
correct paging.

Signed-off-by: Koha Team Amu <koha.aixmarseille@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
I reproduce the issue and I confirm this patch fixes it!

Signed-off-by: Galen Charlton <gmc@esilibrary.com>