MahApps/MahApps.Metro — pull request #1450 by punker76 (2014-06-27 13:24:14+00:00)
Title: [WIP] fix treeview style to allow custom styling

this should solve #1444

![image](https://cloud.githubusercontent.com/assets/658431/3412267/172f0f1e-fdfe-11e3-9dda-667c514f9358.png)

Closes #1444