Change the From field in messages sent from User Name to Display Name

I use a complex User Name for WP administrator and change the Nickname to Admin and then use that as the Display Name as soon as I set up a new site.

This is the first time I have used/tested the Messaging plugin and see that it displays my User Name in the From field of the email.

For security reasons I do not want my administrator user name to be made public so I would like to change the FROM_USER in the Message Settings to the Display Name and not the User Name.

I had a word with Paul on Live Support and he said I should log it here in the Community Forum as a bug,