base: implemented language button: - `component.menu` can now be used with a `{% call %}`, allowing extra HTML to be added after in the <nav> element - a language dropdown is shown if more than one translation is available, allowing to change page locale - if javascript is available, only the dropdown is visible, and changing it reload the page with new locale - if javascript is not available, a submit button is display to change the locale

{% extends 'base/base.html' %}
{% import 'input/xmlui.html' as xmlui with context %}

{% block body %}
<div id="tickets">
    {% for ticket in tickets %}
        <div class="ticket_full">
            {{ xmlui.generate(ticket) }}
        </div>
    {% endfor %}
</div>
{% endblock body %}