Patch 14804 from https://wpftoolkit.codeplex.com/SourceControl/list/patches
Thanks to mbowen
Patch 14017 from https://wpftoolkit.codeplex.com/SourceControl/list/patches
Thanks to paul_sh
patch 13808 from https://wpftoolkit.codeplex.com/SourceControl/list/patches
Thanks to dimit25
fix 13678 from https://wpftoolkit.codeplex.com/SourceControl/list/patches
Thanks to candritzky