This was a very common request across all the sites I asked for feedback on the tutorial.
I’ve added a reset button which is initially hidden, to avoid page clutter, but appears dynamically when the editor no longer matches the initial page load text.
(also @Nick I was able to get the side nav visible on lesson starts which helps a lot, I think)
If you haven’t tried it yet, try it again. I added a little fun 
at the end.