Revert "Replace govuk template with govuk frontend components - rewrite"

app/templates/withoutnav_template.html

@@ -1,16 +1,15 @@
 {% extends "admin_template.html" %}
 
-{% set mainClasses = "govuk-!-padding-top-0 govuk-!-padding-bottom-12" %}
-
-{% block beforeContent %}
+{% block fullwidth_content %}
+  <div id="content">
     {% if current_service and current_service.active and current_user.is_authenticated and current_user.belongs_to_service(current_service.id) %}
     <div class="navigation-service">
       <a href="{{ url_for('main.show_accounts_or_dashboard') }}" class="navigation-service-back-to">Back to {{ current_service.name }}</a>
     </div>
     {% endif %}
-{% endblock %}
-
-{% block content %}
-    {% include 'flash_messages.html' %}
-    {% block maincolumn_content %}{% endblock %}
+    <main role="main">
+      {% include 'flash_messages.html' %}
+      {% block maincolumn_content %}{% endblock %}
+    </main>
+  </div>
 {% endblock %}