(bulma) CSS: fix content overflow in media object: Overflow was sometimes breaking design with media object. This was notably the case when viewing a list item with a long `<pre>` section, e.g. a ticket with a code pasted with long lines). This patch fixes it.

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

{% block body %}
<h1>{% trans %}Not Found{% endtrans %}</h1>
<p>{% trans %}Sorry, we can't find the resource you are trying to access.{% endtrans %}</p>
{% endblock body %}