Revert "[Form] changed the way default type names are created to avoid collisions"
Revert "[Form] changed the way default type names are created to avoid collisions"

This reverts commit d044498cdedea20c9e9a2e36a84e99577b2a26b3.

The reason for reverting is that the name is actually used to customize
the template on a per field basis:

{% block _post_excerpt_widget %}
    ***{{ block('text_widget') }}***
{% endblock %}

Here, post is the name of the Type.

symfony/Form