Support for policy upload/download

Plus a small bugfix for groups

app/templates/index.html

@@ -41,16 +41,16 @@
     </div>
     <div class="col col-6">
         <i class="fas fa-angle-right"></i>
-        {% if auth.groups[0] in config['ADMIN_GROUPS'] %}
+        {% if not auth.groups[0] or auth.groups[0] in config['ADMIN_GROUPS'] %}
         <span class="badge badge-pill badge-warning">
         {% else %}
         <span class="badge badge-pill badge-dark">
         {% endif %}
-        {{ auth.groups[0]}}
+        {{ auth.groups[0] | default('no group')}}
         </span>
     </div>
 </div>
-        {% for group in auth.groups[1:] |sort %}
+        {% for group in auth.groups[1:] | default([]) |sort %}
 <div class="row data">
     <div class="col col-2">
         &nbsp;