* Revert "other: revert disk usage change for now (#962)"
This reverts commit d3661c2320.
* some cleanup
* update help menu
* update screenshot
* update changelog wording
* Remove redundant newlines
* Use type system to ensure help constants match in size
A large migration of documentation over to mkdocs, and some rewrites. Some stuff (install information, basic supported systems, contributors, thanks) are still staying in README.md, and CONTRIBUTING.md is essentially duplicated right now. However, stuff like configuration and key/mouse bindings are now moved to mkdocs.
Some parts are still a bit WIP - it is definitely not done (documentation never seems to be...). However, it should be "good enough" for now, and I'm much happier working with the documentation in this form than trying to scroll through a giant endless README.md file. It also works much better for adding new documentation.