This shows the number of messages sent by humans for the last
eight 24-hour periods, for each realm. "Messages sent" isn't a
perfect metric of activity, but it's easier to query with our
current data model than certain other statistics.
(imported from commit 9de3c479640a0b9dbc017b245dda21d951f4efa4)
For legacy reasons, this template wanted each tab's content as
a one-key dictionary, instead of a string. Each tab already has
a tuple to allow for fields like title, so this wasn't really giving us
any long term flexibility; it was just crufting up the calling
code.
(imported from commit 2a316107ec223a83efa8735f4810a6fa43107541)
Steve Howell