bulma: use Font-Awesome instead of Fontello + start of major redesign: - Font-Awesome is now used instead of Fontello, following change in Libervia Media. - This is a beginning of a major redesign of the web templates/web frontend. This currently breaks a lot of thing.

{% extends 'error/base.html' %}

{% block body %}
<h1>{% trans %}Unauthorized{% endtrans %}</h1>
<p>{% trans %}Sorry, you are not authorized to access this page. An authentication is needed.{% endtrans %}</p>
{% endblock body %}