Differentiate system notes

## What does this MR do?
Differentiates system notes by changing the style. The simplification of system note style makes the user notes stand out, too.

## Why was this MR needed?
System and user notes looked the same and were easy to confuse. 

## Screenshots 
Current:
![sytem notes original](https://cloud.githubusercontent.com/assets/2394772/5516459/d973ab2a-8864-11e4-8b01-19bbdeb1b633.png)

Future:
![system notes future](https://cloud.githubusercontent.com/assets/2394772/5516463/f8a61f1e-8864-11e4-866c-c59ce33dc8ff.png)