[PATCH 0/2][RESENT V2]Test and fix for bug 17198

[Florian Köberle]

Resending emails from 6 days ago:

The following two patches address bug 17198:
http://bugs.winehq.org/show_bug.cgi?id=17198

Changes since Version 1 of the two patches:
+ Changed test to reuse the existing window and TreeView-component.
+ Reduced the number of used variables.
+ Added an explanation to the test. It contains an ASCII graphic of the
tree.