Bug 14423: Multiple XSS vulnerabilities in serials-search

Bug 14423: Multiple XSS vulnerabilities in serials-search

To test

1/ Hit a url like http://localhost:8081/cgi-bin/koha/serials/serials-search.pl?bookseller_filter=%22%22%22%3E%3Cscript%3Ealert%28%27oh%20noes%27%29%3C/script%3E&searched=1&title_filter=
2/ Notice alert boxes
3/ Apply patch
4/ Reload, notice fixed

Repeat for
callnumber_filter
EAN_filter
ISSN_filter
publisher_filter
title_filter

Signed-off-by: Jonathan Druart <jonathan.druart@koha-community.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>