Tagged headers show under non-toplevel headers

Previously, tagged articles would only show up at the bottom of the page for the toplevel header, e.g. you'd only be able to see which articles are tagged as:under the split header page:but not under the non-split:Now tagged articles are also shown under non-toplevel headers, both on static websites and OurBigBook Web.

This makes it much easier for readers to view the tags, as it does not require them to click the header to view it as the toplevel and then go to the bottom of the page.

It also means that headers that are used primarily as tags and which would be otherwise empty now show some meaningful content.

Announcements: