Description of the new feature/enhancement

Here's a really silly thought. What if we just add a new "openSystemMenu" binding? We could be done with this whole issue and allow people to re-bind it to whatever they want! All we'd need to do is move _OpenSystemMenu to IslandWindow, hook up some events from AppHost/AppLogic/TerminalPage (ugh hopefully not all of them) and... we're off to the races! We can also do that work later and mark this part with a big TODO that links to a workitem that says what I just said above^

Originally posted in 10988