Migrates email user options to a new data structure, where `email_always`, `email_direct` and `email_private_messages` are replace by
* `email_messages_level`, with options: `always`, `only_when_away` and `never` (defaults to `always`)
* `email_level`, with options: `always`, `only_when_away` and `never` (defaults to `only_when_away`)
Instead of adding email to unsubscribe url store it in redis for 1 hour
rate limit calls to unsubscribe endpoint to ensure there is no risk of
bloating redis
Also move controller to request specs
- All unsubscribes go to the exact same page
- You may unsubscribe from watching a category on that page
- You no longer need to be logged in to unsubscribe from a topic
- Simplified footer on emails
As it stands we load up user records quite frequently on the topic pages,
this in turn pulls all the columns for the users being selected, just to
discard them after they are loaded
New structure keeps all options in a discrete table, this is better organised
and allows us to easily add more column without worrying about bloating the
user table
While *sometimes* `no_js` was used for visitors without js (for example
disabling it on your browser) it was also used for some pages that were
disabled to JS capable browsers, including the 404 page.
Even worse, sometimes it was used on pages that *had* Javascript, such
as our `/activate-account` route. It has been renamed to `no_ember` to
indicate what it really is, a layout for the site that doesn't load our
Ember.js application.
