Interacting with actions located in menus was broken in a few different ways on mobile. Some of these problems were baked into the menu implementation from the very beginning, and some are a bit more recent. To fix these issues, this change does several things: - Hidden menus were being set to have `visibility: hidden` and `opacity: 0`, but this still can allow them to be interacted with. When in mobile mode, various action menus would overlap, so a click on something in the "Review" menu was accidentally activating things in the "Close" menu. - Interaction with a lot of the menus relied entirely on the `:focus` and `:hover` states. This kind of worked sometimes with the way that mobile browsers deal with touch events, but it wasn't reliable, and barely worked at all with mobile mode in desktop browser devtools. I've added explicit touch event handlers to improve the interaction. - The "Review" menu in particular is very modal, and takes up a lot of the screen when working on mobile. I've added an event overlay over the rest of the page so that taps outside of the menu area will dismiss the menu. Testing Done: - Exercised all of the menus and actions using both mobile and desktop modes. - Ran python tests - Ran js tests