This is so minor it's almost a shame to report it...
When you select Manage Password Policies, the Default Policy
is highlighted and the 'New' and 'Edit' (or 'View' in read-only mode)
buttons are active.
Now if you select one of the empty policy slots, the 'Edit' (or 'View')
buttons are deactivated, as they should.
But if you then select the Default Policy again, the 'Edit' (or 'View')
button is not reactivated.