UI tweaks for scenarios window

WAS:
![init](https://cloud.githubusercontent.com/assets/5421954/4226524/4ecbd752-3938-11e4-8fe5-e4143953d534.png)


IS:
![tweak](https://cloud.githubusercontent.com/assets/5421954/4226527/56220c1a-3938-11e4-9448-38171b973d73.png)

& astyle