Update table Filter/Header to better reflect patternfly l&f

See - https://www.patternfly.org/widgets/#data-tables

EnhancedSearch bar has 'search' button removed. Search picklist should just work as you type or reset focus, without needing to manually select button

![screen shot 2014-07-13 at 10 26 10 am](https://cloud.githubusercontent.com/assets/686641/3564793/b6236a32-0a99-11e4-9993-634a49948696.png)