Broken icons on "Unsupported role assignments"

Preparation Log in as admin. Go to Site administration > Users > Permissions > Define roles Edit Student role and in the (Context types where this role may be assigned field enable System and save. Go to Site administration > Users > Permissions > Assign system roles and click on Student link. Assign role to any user and save. Go back to Site administration > Users > Permissions > Define roles and edit Student role again. in the (Context types where this role may be assigned field disable System and save. Testing With the patch applied: Visit: Site administration > Users > Permissions > Unsupported role assignments Expected results: A row in the Unsupported role assignments table, with the cog icon and bin icons (with "Edit" and "Delete" alt text, respectively).