Initial go at upgrading from Bootstap v3 to v4 and to AdminLTE v3.2.0

powerdnsadmin/templates/admin_setting_pdns.html

@@ -4,7 +4,7 @@
 <title>PDNS Settings - {{ SITE_NAME }}</title>
 {% endblock %} {% block dashboard_stat %}
 <!-- Content Header (Page header) -->
-<section class="content-header">
+<div class="content-header">
     <h1>
         Settings <small>PowerDNS-Admin settings</small>
     </h1>
@@ -13,7 +13,7 @@
         <li><a href="#">Setting</a></li>
         <li class="active">PDNS</li>
     </ol>
-</section>
+</div>
 {% endblock %}
 {% block content %}
 <section class="content">