Display the instance admin on the welcome page

calsocial/__init__.py

@@ -201,13 +201,16 @@ class CalendarSocialApp(Flask, RoutedMixin):
 
         user_count = User.query.count()
         event_count = Event.query.count()
+        admin_user = current_app.instance_admin
+        admin_profile = None if admin_user is None else admin_user.profile
 
         return render_template('welcome.html',
                                calendar=calendar,
                                user_only=False,
                                login_form=login_form,
                                user_count=user_count,
-                               event_count=event_count)
+                               event_count=event_count,
+                               admin_profile=admin_profile)
 
     @RoutedMixin.route('/')
     def hello(self):

calsocial/templates/_macros.html

@@ -25,6 +25,6 @@
     <img src="{{ url_for('static', filename='avatars/' + profile.builtin_avatar + '.svg') }}" alt="" class="ui circular avatar image">
     {% endif %}
     <div class="display name">{{ profile.display_name }}</div>
-    <div class="handle">{{ profile }}</div>
+    <div class="handle">{{ profile or '' }}</div>
 </a>
 {% endmacro %}

calsocial/templates/welcome.html

@@ -73,8 +73,10 @@
         </div>
 
         <div class="four wide column">
+    {% if admin_profile %}
             <h2>{% trans %}Administered by{% endtrans %}</h2>
-            {{ profile_link(none) }}
+            {{ profile_link(admin_profile) }}
+    {% endif %}
         </div>
     </div>
 </div>