major
nice-to-have
defect
major
enhancement
(User-visible)
Currently, it is possible to group items based on wrapper-valued attributes, but you cannot further group them based on the attributes of the target type.
When selecting a wrapper (single-valued) attribute, users should also be able to select its attributes for the grouping. If such an attribute is selected again, the path should be able to be followed accordingly, and so on.
Test
No test.