Add support for HTML5 'aside' element

Idea created by Bruce D'Arcus on Jun 24, 2019
    Open for Voting
    • Rob Ditto
    • cesbrandt
    • Christopher Phillips
    • Leonardo Santos
    • Pablo Mora

    Add the CSS to support the HTML5 'aside' element, which is broadly useful in an edu context, effectively providing the web equivalent of footnote support.