mono/xwt — pull request #358 by viniciusjarina (2014-07-16 00:13:52+00:00)
Title: [Xwt.Wpf] Fixed Tree operations on WPF

[Xwt.Wpf] Fixed Tree operations on WPF
- InsertBefore / InsertAfter was creating the TreeStoreNode with wrong parent.
- Avoid NRE on GetVisibleItem ( ContainerFromItem can return null, even after UpdateLayout call).