The pending order countdown timer shows more than 24 hours. #249
Description
The pending order countdown timer shows a countdown time greater than 24 hours (expiration_hours), which is the length of time a pending order remains in effect.
You can't set expiration_hours + created_at because in cases where an order is taken and then republished, the order will have a new created_at but stop being pending at the same time it would have been if it hadn't been republished.
I think a better option would be expiration - 24 hours, which is the extra time in mostrod for an order to go from pending to canceled.
This order was created 11 hours ago and the clock says there are still more than 24 hours left.
