Fix Bug #1063588 - Add Persona to Profile link broken

Added the necessary data attributes and class to pop the persona login window.

Also fixed some wording while I was in there.

To test this you need to disconnect all Persona accounts and then on the edit profile page click "Use your Persona account to sign in"
Merge pull request #2736 from stephaniehobson/BUG-1063588-add-persona-to-profile

Fix Bug #1063588 - Add Persona to Profile link broken