Sass Clean up & Coding conventions

- Moves the `states/_states.scss` that was alone in its folder to `base/_states.scss`
- Apply css coding conventions to the discussion partial
- Apply css coding conventions to the search partial
- Apply css coding conventions to the tabs partial
- Remove circular progress partial /cc @phamann can you confirm it's not used in live blogs at all anymore?

Basically, a lot of remification.

![ ](http://media.giphy.com/media/ugxTPZzW7QQ1y/giphy.gif)