Paste of subcategories does not work

1. Run the testprops command
2. Check Subcategory Foo Sample
3. Right click on Foo
4. Click copy all properties in category
5. Uncheck Subcategory Foo Sample
6. Right click on Foo
7. Click paste all properties in Category

Expected result: Subcategory Foo Sample should be checked

Actual result: Subcategory Foo Sample is not checked