Add frontend work

aleksis/apps/paweljong/templates/paweljong/event_registration/full.html

@@ -23,6 +23,11 @@
           <i class="material-icons left iconify" data-icon="mdi:edit"></i>
           {% trans "Edit" %}
         </a>
+
+        <a href="{% url 'retract_registration_by_pk' registration.pk %}" class="btn waves-effect waves-light">
+          <i class="material-icons left iconify" data-icon="mdi:account-cancel"></i>
+          {% trans "Retract" %}
+        </a>
       {% endif %}
 
       {% if can_delete_registration %}