More applauncher panel work Resolves #360

### changes:

* Power toggling button replaced with information-only text.
* Terminal activation button uses icon instead of text - smaller and nicer looking.
* Hovering the mouse over a row of the scrolled display causes that part to glow with a purple highlight.


![screenshot154](https://cloud.githubusercontent.com/assets/5216848/5009933/5159924a-6a32-11e4-8149-8aff54bd4ec3.png)