After focusing a property's editor in the PropertyGrid control of a CollectionControl and attempting to click on another item in the listbox (PART_ListBox), it will stay on the on the current item until you click again.
Steps to reproduce:
1. Add this class: `public class MyClass { public string MyString { get; set; } }`
2. Add a CollectionControl with an ItemsSource containing two `MyClass`
3. Select first `MyClass` and edit the `MyString` property
4. Try to select the second `MyClass`
It will refresh the listbox and stay on the first class until you click again.
Steps to reproduce:
1. Add this class: `public class MyClass { public string MyString { get; set; } }`
2. Add a CollectionControl with an ItemsSource containing two `MyClass`
3. Select first `MyClass` and edit the `MyString` property
4. Try to select the second `MyClass`
It will refresh the listbox and stay on the first class until you click again.