Bug 1075998 - Use soft deletion for add-on reviews, and allow admins to ...

...restore them.
On Wed, Dec 10, 2014 at 01:36:41AM -0800, David Larlet wrote:
>Why not a second manager like `WithDeletedReviewManager` that inherits from the existing one? I think it's better that having that `include_deleted` option.

I think that probably makes sense, but this is how the other models with soft deletion currently work, so I'd prefer to maintain consistency for now.