VerticalLayout: stickyFooter similar to stickyHeader

[berndeppler]

The stickyHeader functionality is a very useful feature but there is no chance to use a stickyFooter. That would be also a very interesting feature for a GroupedList, e.g. the list shows permanently a summary of any values while scrolling until the next group is reached. How do you think about this?

Best regards B. E.