updated email templates to match mocks

* note from shane-tomlinson - This is a squashed rebase of johngruen's work across several commits, minus style changes to main.css and the templates.

(cherry picked from commit 5bcb582973a0802ae0f5ba2e09b328f0e0c3f261)
(cherry picked from commit d9901a26bd4e1e8d23e8cd09a65c07450f143081)
(cherry picked from commit 1f0e0e780ba9fdcb6a28fa9b469f0d7cd58d497c)
(cherry picked from commit af101caa9511f2ebb33419472267e131933eedac)
Merge branch 'email-updates-squashed'