I would like to see the ability to edit

I would like to see the ability to edit the administrators-notices.php file from the plugin dashboard.
The line: [A new user (###SUBSCRIBER_EMAIL###) has confirmed its subscription to your subcribers list.] Has two issues:
1. subcribers - misspelled
2. "... confirmed its subscription" should be changed to "... confirmed their subscription" - better grammar.
I made these changes to my .php file, but this will be overwritten with the next update.