Configuring the Priority of the Notification Event

As as user, I would like the ability to configure the Priority of the Notification Event that are being sent out to the users, as it is easy to distinguish which notification that are important on the Mailbox.

For example, if a watcher of a ticket is being mentioned on a ticket, it still receive the "issue commented" notification rather than "you are being mentioned", this could be a problem if there is many users that are comment on the ticket at the same time, make the important message is buried under it.