If I switch to Diff tab of a pull request with lots of changed files I can hardly click on the link of the last file in the Files tree view because it is almost completely hidden by the URL tool tip which appears when I put mouse pointer over the link of that file (see attachment below).
It is a known bug in Edge for which they offered a workaround for now https://stackoverflow.com/questions/34544772/microsoft-edge-status-bar-is-blocking-buttons . It would be nice if you will implement one too.
MS Edge 40.15063.674.0
OS Windows 10 Pro