Allow us to bind an e-mail notification to a newly created status, instead of locking them to preexisting status we may never use

Title

We cannot inform our clients that their order are 1. Being processed 2. Was expedited 3. Was canceled. This seems a rather important oversight !

There should simply have a menu in "workflow => statut" saying "would you like to send a notification when a command reaches this status ? If yes, please select it in the list below"