* Demographics page:
* Show percents with up to 1 decimal place of precision.
* On tablets+ align the percent text to the right.
* On photo counts, only include certified active user photos.
* On gender/orientation demographics, pad the remaining "No answer" counts
with the set of users who have no profile_fields set in the database yet.
* Admin certification page:
* Add additional "common rejection reasons"
* Add a confirm prompt when viewing the Rejected list to avoid accidental
approval of previously rejected cert photos.
* Add the PollVotes table and associated logic.
* Multiple choice polls supported.
* Expiring and non-expiring polls.
* Icons and badges on the forum pages to show posts with polls
* Bugfix: non-explicit users getting SQL errors on Newest Posts page.
* Add "forgot password" workflow.
* Add ability to change user email address (confirmation link sent)
* Add ability to change user's password.
* Add rate limiter to deter brute force login attempts.
* Add user deep delete functionality (delete account).
* Ping user LastLoginAt every 8 hours for long-lived session cookies.
* Add age filters to user search page.
* Add sort options to user search (last login, created, username/name)
