No editor is opened when you Click Notify Admin, it just notifies the Admin the Subject: Notification Alert and an empty Message:

Have you modified the script, templates, and or language files in any way?

I Have Modified the Header and the Footer templates.

Did you change this setting in the admin control panel?

user_message_not_message

I looked at the demo and it doesn't give the visitor a place to give a comment ether. So maybe I complained about nothing. Sorry!
I just thought that it would have a editor so the visitor could make a comment about the Item to the Admin.