Allow HTML in translation labels

[akno77]

Currently it is not possible to use HTML code in the translation labels. Even in the "HTML Tag Type" element this is not possible.

Would be nice if it is possible to use HTML in the labels.

[akno77]

Ok, I solved it by myself by overriding the Symfony template block:

{% block form_label %}
    {% set label_html = true %}

    {{ parent() }}
{% endblock %}