The "rating" widget should not have the "unknown" accessible role
Steps to reproduce:
- View the details of an item (e.g. a station under radio)
- Launch Accerciser and inspect the "rating"
Expected results: The rating widget would not have the "unknown" role. Actual results: The rating widget has the "unknown" role.
Screenshot (look for the "<<<<<"):
Impact: Orca doesn't know what the thing is. Therefore it doesn't know if and how to present it. (Orca tends to ignore things with the "unknown" role for that reason.
Note: Many roles would be "good enough", but there's an ATK/AT-SPI2 "rating" role.