Steps:

1. Go to Admin/Roles.
2. Open assignment page of one role, e.g. Editor.
3. Click on Select users button.

Actual result:  In UDW user is allowed to select all content items. When user selects e.g. Folder Content Type and saves then validation appears but he is unable to unselect it. Changes must be discarded and assignments edited again.

The same occurs for Select groups.

Expected result: UWD should be limited to user/user group content type.