Select document series/group when speed tagging
Index document series on document series
Allow preview of Markdown on doc series group bodies
List of docs in a series supports unpublished editions
Copy changes after brief usability test with Alice
Removed functional test

The test was just testing that code that was removed as part of an
urgent bug fix actually got removed. The implementation of what it
tested has changed, which caused the test to fail, which prompted me to
remove it.
Don't run doc series JavaScript on every page