Printout improvements

[oscarlevin]

This fixes three separate issues with printouts (worksheets and handouts).

1. There apparently is a bug with how we were swapping out stylesheets in the newest version of chrome. That's fixed. Thanks Claude Opus 5 :)
2. Footnotes had never worked in printouts: they would be opened mid paragraph as a knowl. Now they migrate to the bottom of their page.
3. A paragraph that had a long list (ol/ul/dl) would overflow a page. Since we now do a better job fixing page overflows in general, it was a simple fix to add this for the list case.

Mostly javascript, with a few css tweaks for the footnotes (so both js and css needs a rebuild). Examples of both footnotes and multipage lists added to the sample article.

[oscarlevin]

Just force pushed after a rebase on master.