Bug 32434: Show "Lists" line on lists results

Bug 32434: Show "Lists" line on lists results

This patch adds a "Lists:" line on the lists results so that the
output matches the search result output.

This allows users to know which records belong to which lists.

Test plan:
0. Apply patch and koha-plack --restart kohadev
1. Go to http://localhost:8080/cgi-bin/koha/opac-search.pl?idx=&q=test
2. Add all 3 results to a new list called "Test"
3. Note that "Lists:" appears in the search results
4. Click on "Test" in the "Lists:" line
5. Note that it takes you to the list "Test" and that "Lists:"
still appears in the results

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>