Add a callback

[GriffinSauce]

The callback will be called when the notification has been created, with as parameter the element of the notif.

CommandManager.execute("notifications.notification",
{
    title: "Message title",
    message: "Message body"
    callback:function(element){  /* do stuff */  }
});

This can be used by the firing script to manipulate the notification afterwards. Like updating information or adding customized interaction.

[HalleyInteractive]

constructNotification returns the notification object. Maybe having callback isn't necessary anymore.