It seems like any of the major things needing done are all fixed up besides that missing icon, though I've noticed one HWA oddity today. When going from a frame that is smaller than the frame containing the Tile Map Viewport, the whole screen will seem to just stop updating, either going all white or leaving the last visuals that were on screen there. In Standard, the issue doesn't happen.
Considering the viewport is usually intended to fill the entire screen, this isn't much of an issue, I only noticed it due to having a frame loaded for a split second that I had other plans for later on but currently stuck with "Start of frame: next frame" for now. I changed the size of it for a moment and thought the extension died forever somehow, but it was just this bug.