Non-email generating comments in Service Desk issues

Description

As a EEP user of Service Desk, I want to be able to comment on a generated Service Desk issue and not have it generate an email back to the customer, so that I can discuss the issue internally without fear of releasing information to the customer that is meant to be an internal discussion only.

Proposal

Enable a comment to be "non-email generating" by default and require the commenter to actively check a box before an email would be sent to the originating customer.