Bug 901491 - [bb][refactor] Status

Main points:
* Splitting a file `status.css` in to 2 new files: `layout.css` and `responsive.css` (like in [bb][headers] for consistency)
* Modification and rearrangement of some rules and properties
* Аdding `responsive.css` with rotation support
* Adding `RTL` support
* Modification of `index.html` (like in [bb][headers] for consistency)