Option to see range of commits for pull request

Often when someone creates a pull request, they work on it iteratively as feedback is received.

If I look at all the content in a pull request and a single commit is pushed subsequently, it's easy for me to go to the "commits" tab to select the new commit to see the diff. This is more difficult if multiple commits have been made since the last time I looked.

It would be nice if stash had an option to let me see all the changes between a range of commits for a pull request so I don't need to checkout the source to do a diff against the last commit I looked at.