Fix dashboard for non registered users

Do not show launch conference section if user has not purchased a ticket.

pinaxcon/templates/symposion/dashboard/_categories.html

@@ -41,6 +41,7 @@
     </div>
   </div>
   {% else %}
+  {% if purchased %}
   {% flag "venueless_dashboard" %}
   <div class="row">
     <div class="col-12 mb-3">
@@ -52,6 +53,7 @@
     </div>
   </div>
   {% endflag %}
+  {% endif %}
 
   <div class="row">
     <div class="col-md-6 mb-3 mb-md-0">