Bug 26445: Fix "back to result" link of the search result browser

Bug 26445: Fix "back to result" link of the search result browser

Not sure what was the expected behaviour, I am suggesting the following
one:
If you are browsing and you click "back to result", you will be
redirected to the page where the record appear on the search result
list.

Say you search for "something" that returns 10 page (20 results per
page)
Click on first result first page
Click back to result
=> You see the first page with the first result at the top

Click on second page, 3rd result
Click back to result
=> You see the second page with the biblio you clicked at the 3rd
position

Click on second page, 3rd result
Click next/previous
Click back to result
=> You see the page where you last result were.

I think the existing expected behaviour was to have the result you
clicked at the first position of the result page, but I am not sure it
really makes sense.

Hope this makes sense however!

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>