Fix small issue with purchase reciving

When editing a already confirmed purchase and checking the option to receive
it now, we set the order as confirmed, but we should do that only if the
order is not confirmed yet.

Change-Id: I6ebebfa62046ffee41b240085e2f64b45351b5c7
(cherry picked from commit 80ffc90621718f76f839226aef539e9e6380fd9d)