An arrow element is now inserted into the dom to orient the bubble to the fnref
element that opened it. This is offset in the opposite direction to the bubble
if the bubble overhangs one side or the other.
Additionally, if both sides overhang then no positioning takes place. This
is the first step towards supporting more narrow windows and mobile clients.
* Uses a stylesheet to hide the reverse link in the popover rather than monkeying around with the dom in JS
* Javascript event handler catches clicks on the reverse buttons in the footnote list at the bottom of the page
and scrolls the document back to the source, rather than opening the document in a browser window.
These changes are the bare minimum required to get footnotes to appear and function on the article page.
* The newsfoot.js script now wraps everything in an IIFE to prevent bleed to other scripts
* Stylesheets are included in the main stylesheet, with the colors extracted out into separate selectors
Currently missing the arrow pointing to the footnote link, and no consideration exists for mobile presentation
beyond a max-width: 100vh on the footnote popover.
