Implementing something that I sketched as a redesign and am far enough along in that to see that I do, indeed, like the new design better from a usability perspective. I feel like the new design makes what it is more obvious, shows more information, and saves 1 click per operation for mouse users.
Also deleted a bunch of code left over from some unrelated exploratory work that was ultimately a dead end since none of it was needed for the solution I eventually got to. I thought I'd already deleted all of that, but I guess not.