doc navigation - fixed header, sidebar?
I've always been frustrated with how you can't figure out where you are when you're deep into a documentation page. Can we try a layout like this page: https://foundationdb.com/layers/sql/documentation/GettingStarted/SQLAlchemy where:
our yellow box at the top with "prev/next" etc. stays fixed as it hits the top of the page
the sidebar is an independent scrollable bar with dynamic highlighting
we move "search" somewhere so that it at least is always on the page