back to c3nav link in control panel
{% block content %}
<main class="control"{% block addattributes %}{% endblock %}>
{% include 'site/fragment_messages.html' %}
+ <a href="{% url 'site.index' %}" class="float-right">&laquo; {% trans 'back to c3nav' %}</a>
<h2>{% block heading %}{% endblock %}</h2>
{% block menu %}
<nav>
