Enable WP UI for TinyMCE widgets

Hi there,
I am the author of Black Studio TinyMCE Widget plugin, which adds a widget type with an inline wysiwyg editor.
An user of my plugin requested to use the WP UI functions on the editor instances of these widgets, but actually this is not possible because the WP UI code is not loaded in widgets.php page. Could you change that?
For further info and code snippets, please take a look to the original thread.
Thank you.

http://ww.wp.xz.cn/extend/plugins/wp-ui/