Insight bugfix 8123

Fixes a display issue with the description box. The edit button has been moved slightly so that it does not scroll within the scroll pane.

## Before

![Gus Ferguson s Data Manager](https://f.cloud.github.com/assets/144106/227414/bae8d186-865d-11e2-848e-107e349b53ea.jpg)

## After
![8123-insight-resize-description-box-with-button-placement](https://f.cloud.github.com/assets/144106/227416/c1da98d0-865d-11e2-98ee-ae14fa961b7f.png)