support for multiple class on radio button

[alwex]

Currently it is not possible to build an inline radio button form becase the decorator always set the label_class attribute to radio.

here is a suggestion to allow to add custom classes to radio button label

if ($e->getType() == 'Zend_Form_Element_Radio') {
$e->setDecorators(self::$_MultiDecorator[$format]);
$e->setSeparator('');
if ($e->getAttrib('label_class') != null) {
$previousClass = $e->getAttrib('label_class');
$e->setAttrib('label_class', $previousClass . ' radio');
} else {
$e->setAttrib('label_class', 'radio');
}
}

[Mischosch]

if you want to, create a PR for it and we will look into integrating it