MahApps/MahApps.Metro — pull request #407 by punker76 (2013-04-04 09:32:20+00:00)
Title: fix groupbox margin Issue #399

use the templating margin to padding instead to margin property
![2013-04-04_11h29_01](https://f.cloud.github.com/assets/658431/338291/86450ecc-9d0a-11e2-81bc-be0bd6ab4557.png)