QML ListView Should Support Dynamic Headers and Footers

ListView does not handle dynamic headers/footers very well. Currently, if the header changes height because of content change, the scroll-position will jump. In some cases, it has been observed that the new header renders over top of the old header (clearly an error, as there can be only one header). I presume this is because ListView is not detcting that the header has changed, and the changed height is not accounted for in scroll position; hence the jump.

We want to be able to use ListView because of its memory efficiency. However, the views being implemented require heterogeneous content at the start and end of the list. This content will be state-full and changes as the user interacts with the view. Unfortunately, ListView is proving very inflexible in its support of dynamic header/footer content.

At the very least, ListView should provide a signal so that it can be notified of header/footer content change so that it can update properly.