Bug 10691: use authority ID in see-also links in authority search results (OPAC)

Bug 10691: use authority ID in see-also links in authority search results (OPAC)

This patch changes the URL and data used to show the 'see also' links
on the OPAC's authority search results page.

Bonus points: makes some strings translatable.

To test:
- On your dev setup (master) create some authority records (I created
  personal name authorities).
- Pick one of them and link 400$a to another one, do the same with 500$a
- Add some other 400$a and 500$a without linking (i.e. plain text)
- Make sure zebra is running and changes got indexed.
- In the OPAC search for the authority that is linked to the others.
- Check the 'see also:' link points to an authority search
- Apply the patch
- Reload/re-do the search
- Check the 'see also:' link points to the authority id in the case
  of linked authorities, and to an authority search in the case of
  plain text headings.

Sponsored-by: Universidad Nacional de Cordoba
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Work as described. No errors

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>