revert 0c8fb222 - breaks scaling

commit 0c8fb222 breaks scaling. Hopefully I have revered it correctly

Look at the traffic graph widget on theme pfsense_ng_fs:

Before revert:
![screenshot from 2014-08-25 11 33 35](https://cloud.githubusercontent.com/assets/4223752/4028989/207b4336-2c47-11e4-83bf-bb36180b0815.png)

After revert: 
![screenshot from 2014-08-25 11 31 07](https://cloud.githubusercontent.com/assets/4223752/4028991/22478f26-2c47-11e4-8434-2d0e0149ecea.png)