Remove reference to non-existent submit button.
Technetium: Don't change color picker's borders.
dash: Make bot name purple instead of white.
CSS cleanup; make the BBCode shortcuts buttons.

borders.css and layout.css rewritten.
Add a missing .row class in the settings table.
Delete obsolete img/index.html cloak.
Replace Sulfur with a new stylesheet.
Fix a CSS selector so it doesn't override.
Strip a few leftover debug calls.
Only send status notifications if the status changes.

If a presence arrives for a currently online user,
then only emit a status notification if either the <show/>
or the <status/> have changed. Some clients spam these
presences repeatedly while they are in away mode.