TbSelect2 issues

[falk]

https://github.com/clevertech/YiiBooster/blob/master/widgets/TbSelect2.php#L40 disallows empty data, this is however needed in my case where I populate the dropdown using an separate ajax call (chanined select boxes).

Could you add an option to allow empty data initialization?

It would also be nice if the widget added the needed empty extra option if placeholder is defined, like http://www.yiiframework.com/extension/select2/ does:

if (isset($this->options['placeholder']))
            $data[''] = '';
        $this->data = $data + $this->data;