Bug 13609: Patch for 3.16.x and 3.14.x (3.16.x needs both, 3.14.x just this)

Bug 13609: Patch for 3.16.x and 3.14.x (3.16.x needs both, 3.14.x just this)

To Test:

- Use an installation a reasonable amount of authorities, so that you
  can have a search result list with more than one page
- Activate OpacAuthorities
- Create an OPAC link like shown below, verify that an alert is shown
- Apply patch
- Refresh the page and no alert should appear
- Verify the paging still works correctly for 'numbers' and 'arrows'

URL: .../cgi-bin/koha/opac-authorities-home.pl?and_or=and&marclist=match&op=do_search&operator=contains&orderby=HeadingAsc2"><script>prompt(987898)</script>

Signed-off-by: Mason James <mtj@kohaaloha.com>
(cherry picked from commit 20dd347c4866226e29c4bbeeebf66a33f347302a)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>