So I think I like this link/back-to-top functionality, but I think I'm going to ask that we add it later. None of the other guides (besides the ones you're altering in this PR) have this, and it's very important to have things consistent throughout the manual.

Maybe we can open an issue on this, because it's a great idea: I just just want to consider it separately. I'd also like to consider adding it to li3_docs so they're created automatically or something, as it presents a maintenance issue.