I think it'd look nice to have this show up within the editor. Kind of like in Asana. By having it within the confines of the text area, it more directly connects it to the content.
I don't know how hard this is. It'll have to happen before we release Review Board 5 for sure, but I know you have a full-time job these days. If this ends up being a lot to figure out, I'm okay committing without this, and moving this work to our plate.
