FMod - Multiple tour watchdog planes

When I last left off working on the Abiathar tour, I noticed that since the watchdog render plane can only be registered for one level plane, it won't pick up the user's tile placing if it doesn't happen to affect that plane. So today, I made the tour extension register three watchdog planes, one for each level plane. The foreground is special-cased to be the only plane that triggers advancement past the task that asks the user to adjust the foreground only.