Bug 15035: Anti-spam for opac-suggestions - FOLLOW-UP

Bug 15035: Anti-spam for opac-suggestions - FOLLOW-UP

to test this patch...

1/ enable 'suggestion' and 'AnonSuggestions' sysprefs

2/ edit the koha-tmpl/opac-tmpl/bootstrap/en/modules/opac-suggestions.tt file,
    to reveal the hidden 'negcap' field

   replace line 87 opac-suggestions.tt, from...
     <li id="negcap" style="position: absolute; left: -2000px;">
   to ...
     <li id="negcap">

3/ attempt to add another suggestion, and populate the 'negcap' field
   adding the suggestion is supposed to fail, but actually succeeds!?  :/

4/ apply patch

5/ repeat step 3, suggestion attempt should fail as expected

	modified:   opac-suggestions.pl

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Confirmed insertion with negcap before patch.
With negcap value suggestion fails silently
Without negcap suggestion is inserted
No errors

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 6b31947c3bb6517ecdc7d21440ba79895c270749)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>