add class

src/server/views/admin/app.html

@@ -14,7 +14,7 @@
 {% endblock %}
 
 {% block content_main %}
-<div class="content-main row">
+<div class="content-main admin-app row">
   {% parent %}
   <div class="col-lg-9" id="admin-app"></div>
 </div>