Resolve "Update to Antora UI"

Closes #1

See merge request common/contributing-ui!1

Jonathan Race authored 5 years ago and Christopher Apsey committed 5 years ago

Updated various style components, to include the footer text, font-size, url links for the home button and re-ordering the Projects menu. I removed the edit this page from the UI along with the version numbering in the top right.

Add clojure to highlight.js languages

- set position relative on .nav-menu
- remove position relative from .nav-item
- optimize computations for scroll into view
- remove debug statements

resolves #59 preserve character references in page title part of html title

resolves #51 make text of text-only nav item with children clickable

- use absolute positioning for toggle to avoid unintended wrapping behavior
- reduce size of toggle button
- tighten line height
- adjust spacing

resolves #56 add missing table cell alignment classes

resolves #25 remove fancy ordered list numbering styles