This PR aims to fix #7404. I've improved the js code of the live widgets to ensure the elements are still present in body before new ajax calls are triggered. Before there were only checks if the element were still kind of present, which was the case, even when not within the body.
How about using this alternative to test if the element is in the DOM: http://stackoverflow.com/a/3086084/245552 I'm not sure performance matter that much here but the suggested solution is 2 orders of magnitude faster so why not.
I'll check/test that tomorrow