Add link to participant list.

ticdesk_org/templates/ticdesk_org/persons.html

@@ -17,6 +17,10 @@
   <p>
    {% blocktrans %}Weitere Formate{% endblocktrans %}:
    <a href="{% url 'map' %}?group_cn={{ group.cn }}">{% blocktrans %}Karte{% endblocktrans %}</a>
+   &middot;
+   PDF (
+   <a href="{% url 'persons_by_group' group.cn %}?format=pdf&amp;template=list_participants">{% blocktrans %}Teilnehmerliste{% endblocktrans %}</a>
+   )
   </p>
 
   {% render_table person_table %}