The design for the new unified banner includes a few new icons, which hadn't yet been added to our spritesheet. In order to make it easier to add new icons or identify existing ones, I've also added a debug view which shows all of the icons (with bounding boxes). It turns out that I'd also mistakenly committed an icons.afdesign file a while ago. I've deleted in here. Testing Done: Loaded /debug/icons/ and saw all of the icons, including new ones.