Tables of contents are now statically rendered in their appropriately
open/closed states, rather than updated via JavaScript, so they render
correctly on the first page load. In order to make the "page sections"
table still usable without JS, this adds a stylesheet in a <noscript>
tag that forces the sections into an open state.
This gives us a place to disambiguate between implementation statuses
that refer to the entire feature under discussion, and those that just
refer to sub-features.
* Make the font smaller to make them less prominent and help visually
associate the callout with the list.
* Decrease the top margin to more clearly associate them with their
preceding header.
* Lighten the callout background when in another callout to make it
more visible.
* Animate the expand button.
