The new unified banner makes it much easier to not forget about draft replies (which could previously have been hidden deep within a very long review request page full of reviews and updates), but just seeing that the reply exists still makes it a little annoying to find it. This change makes it so switching modes in the banner to a review reply will scroll the page to the review being replied to. Testing Done: Set up a long review request with lots of updates and reviews, and created some draft replies. Saw that switching modes correctly scrolled the page (and looked good, due to the scroll-behavior setting).