Some UI design changes for the Notebook and associates

![screen shot 2014-12-15 at 5 44 47 pm](https://cloud.githubusercontent.com/assets/3292874/5447393/2065f592-8482-11e4-9489-de5d21324fe1.png)

Oh ! `vh` ! cool. is it in `kms` or `cgs` unit system ? :-P