Add advice boxes to Resources page
Organize CSS files better
Add short features class for boxes
Remove duplications from pages
* Move repeated classes to parent class on learn overview & resources
Make organize page content less SF-focused
Styling for some individual box sections in learn
Scope ul styling to show <ul> bullets as disc
* Only show no bullet points on feature boxes instead of everywhere
* Remove intermediate "with-dots" style
Remove redundant styling on learn overview
* Change link styles on help page to link_to instead of nav_link
* Update box height for learning overview's get-the-most-out section