Profile page revisions

* Adjust profile page per spec revisions
* Emails tab: opt out of e-mails for specific events
* Privacy tab: "public/private" instead of "lock/unlock
I spoke to @jfrankl about this yesterday, and he said there was no intention to link directly to the user profile settings from the user profile.

This "Privacy" link will open a popup.

The user profile settings are only linked to from the main navigation (the hamburger button in the top left)