Disable Reset on Context menu when property is not Set
Set BoundsPrecision to 1, you can't place Controls so Perfectly with the Mouse, so this is enough
or you get ugly Values like Width="123.45678912" in XAML
Fix Resizing & Positioning when Zoomed in or Out
Rotate Thumb loses it's Rotation when used again, fixed
PrimarySelection should also call RaisePropertyChanged