core: fix hack data add to testdata

packages/ui-default/templates/record_detail.html

@@ -53,7 +53,7 @@
         <ol class="menu">
           <li class="menu__item">
             <a class="menu__link" href="{{ url('problem_hack', pid=pdoc.pid|default(pdoc.docId), rid=rdoc._id) }}">
-              <span class="icon icon-close"></span> {{ _('Hack') }}
+              <span class="icon icon-debug"></span> {{ _('Hack') }}
             </a>
           </li>
         </ol>