- Slightly improves navbar link color contrast (still need to do better, will explore tweaking the new purple)
- Moves subnav styles into new
_subnav.scss - Renames
_nav.scssto_navbar.scssfor docs styles - Restores
heightandoverflow-yfor sidebar scrolling
@XhmikosR Didn't want to push to your docs PR, but if you want, I can cherry-pick and move it over.