[Feature Request] Be able to filter for only unread replies

Sometimes I intentionally keep older replies unread as a reminder to go back to them later if they're addressing material that I can't get to at the moment but can follow up with later. So could there be a way to filter for only unread replies so that I can find those more easily? That would be great.

So... That was all the original post body. Then I realized (which I had somehow missed) that there is an "Unread" button already. The weird part is that it doesn't have an unread pip icon even if "replies" does. This really kinda threw me off for a bit.