Bug 13327: OPACPopupAuthorsSearch doesn't work with XSLT views

Bug 13327: OPACPopupAuthorsSearch doesn't work with XSLT views

This patch reimplements the OPACPopupAuthorsSearch feature so that it
will work in the XSLT view.

To test, apply the patch and rebuild the OPAC CSS
(https://wiki.koha-community.org/wiki/Working_with_SCSS_in_the_OPAC_and_staff_client).

 - View the detail page for a bibliographic record in the OPAC.
   Test under the following conditions:

 - OPACPopupAuthorsSearch ENABLED, OPACXSLTDetailsDisplay "default"
 - OPACPopupAuthorsSearch ENABLED, OPACXSLTDetailsDisplay empty
 - OPACPopupAuthorsSearch DISABLED, OPACXSLTDetailsDisplay "default"
 - OPACPopupAuthorsSearch DISABLED, OPACXSLTDetailsDisplay empty

In each of these cases, test the detail page's listing of additional
authors/contributors and subjects. Test records which have both multiple
contributors or subjects and which have only one author or subject.

When OPACPopupAuthorsSearch is turned on, verify that the author/subject
selection modal appears and that your selections are correctly combined
to build a search string.

Note that OPACPopupAuthorsSearch feature has a problem with terms
containing parentheses. The issue predates this patch.

Also note that the QA tools will give a false positive about Bootstrap
button styles. This rule only applies to the staff client.

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>