{% load cms_admin %}

{# Non-field errors are not part of a fieldset, so render them separately. #}
{{ form.non_field_errors }}

{# Hidden fields are rendered outside the fieldset, mirroring django admin. #}
{% for hidden in form.hidden_fields %}{{ hidden }}{% endfor %}

{% admin_fieldset form as fieldset %}
{% include "admin/includes/fieldset.html" with fieldset=fieldset heading_level=2 %}