1) Include the Webblock Feedback_Message_Proxy into your theme or screen.
Note: This does not replace the Richwidgets Feedback web block, this is only a way to extend the Richwidgets feedback message behaviour.
2.1) Then just replace the original Feedback Actions with this new one. There is a new optional parameter "Timeout" that allows you to set the timeout in miliseconds for your feedbacks to hide.
2.2) Also you can use one of the Four helper methods to easier and cleaner way of using the feedback message:
* Version 2.0.0 upgraded to O11;