change block personcontent to content more consistent with other templates and less need for if-statements

src/Bundle/ChillMainBundle/Resources/views/Admin/layout_permissions.html.twig

@@ -25,7 +25,7 @@
 {% endblock %}
 
 {% block layout_wvm_content %}
-    {% block admin_content %}<!-- block personcontent empty -->
+    {% block admin_content %}<!-- block content empty -->
         <h1>{{ 'Permissions management of your chill installation' |trans }}</h1>
     {% endblock %}
 {% endblock  %}