first change and last change buttons (e.g. |< and >| )

It would be nice to have the following in the Changes window:

Currently there are the 'Previous Change' and 'Next Change' buttons (up and down arrow), but when reviewing it would be nice to skip back all the way to first change in the current file ( |< ) or even to the first of all changes (  |<< ). And likewise for Last Change in file ( >| ) or in all files ( >>| )