Makes settings console usable on tiny screens

As per #959.

Tested in Firefox and Chrome.

![res-settings-tiny-screen](https://cloud.githubusercontent.com/assets/7245595/3252365/814a8cd4-f1bf-11e3-9c89-60e1d76cbc18.png)

The scrollbars only appear when necessary and the left menu stays in the same position just as it always did.