sup at bottom of article results in footnote that can extend below article height

[darth-cheney]

If a footnote is placed within the final sentence in an article, and if the text of that note is longer than one line within the .footnote-bar, then the current script results in a formatting whereby the .footnote-bar is extended lower than the article (and this the content we're concerned with). It looks bad, too.

Needed: a new calculation thrown into the mix that finds the bottom position of the main-text container, translates it into .footnote-bar's equivalent, and then sets a limit on how low footnotes can extend. Since we can already get a footnote's bottom using both bottom() and offBottom() methods, is should not be much of a hassle to throw this extra consideration into the mix.