A simple mistake

While testing, we would often make a mistake, miss-click, or run into a bug. When this happened, we often let out a sigh, pressed play and let our horrible plan run its course. We had no way to fix a broken or bad plan, and watching a bug ruin everything felt horrible and slowed down testing. With our updated planning code, adding a back button was quite easy. So here it is! We no longer need to keep a plan that is doomed to fail.