Bug 38191: Restore collapse/expand of filters on the suggestions page

Bug 38191: Restore collapse/expand of filters on the suggestions page

Test plan:
Go to http://localhost:8081/cgi-bin/koha/suggestion/suggestion.pl
Confirm that you can expand the filters blocks on the left

Filter by:
 Bibliographic information
 Suggestion information
 Acquisition information

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>