sonata-project/SonataAdminBundle — pull request #1012 by andreadelfino (2012-11-06 14:44:30+00:00)
Title: Fix block_name field descriptor always set to false

In `buildForm` method of `FormTypeFieldExtension` class, `block_name` is always set to `false`.
This modification allow to set this option among field description in a form mapper, and will be exposed as block name by `buildView` method.

Example:
```php
$formMapper
->add('foo', null, array(), array('block_name' => 'my_foo_bar');
->end();
```

Will be available as:
```twig
{% block my_foo_bar_widget %}
{# something #}
{% endblock %}
```