This change also alters how edits are displayed both for sequential
and non-sequential messages.

See #1357

This uses a special "?" character that is understood by the /avatar/
route and will be treated specially. This change also adds url
encoding/decoding around username usage via the url for the avatar.

This comes in the form of the user's avatar, along with a hover
title that shows username and edit time. As a side note, this
requires us to start saving 'editBy' id as part of message updates.

This has been tested with all 4 of the current avatar methods.

fixes #824

Note that this also makes a minor tweak to scope of "if description"
check in admin.html, that is more correct.

This change also swaps out the settings group display from <h3>
to <p> for a better look and feel.

Name is now optional when registering