Use class instead of dict for events

templates/index.html

@@ -103,7 +103,7 @@
     </td>
     <td>
     {{ event_labels.get(event.name) or event.name }}
-    {%- if "title" in event -%}: {{ event.title }}{% endif %}
+    {%- if event.title -%}: {{ event.title }}{% endif %}
     </td>
     <td class="text-end">
     {{ days(event.date) }}