Allow multiple email addresses in reply-to field in CP Notifications

[john-henry]

Reply-to fields allow by default multiple email addresses in an array.

https://share.johnhenry.ie/9ZudNwLl

When creating Freeform notification in the control panel there is no way of adding multiple emails without getting an error when notification sends.

Please allow the option to add multiple email addresses in this field using comma delimiter

Note this is possible to add a reply-to array if you are using a notification template but in my case, the client updates the template themselves every so often so it needs to work in control panel