Remove test classes from UI plug-in

Change-Id: If6d24f2284e79d2f99d94b26f0cadbd7b439a3f5
Signed-off-by: Denis Knoepfle <denis.knoepfle@sap.com>
Prepare for #111 tabbing in Properties Viewer

Change-Id: I8f4f26b2d23fd6d41ea66d7dc452e8213f8ccf84
Signed-off-by: Denis Knoepfle <denis.knoepfle@sap.com>
Merge pull request #123 from DenisKnoepfle/master

Prepare correct traversal in Properties Viewer