Trigger an email when a comment has been edited.

Description:  When a user comments on a task/issue an email is triggered to the user assigned.  However when a comment is edited there are no additional email notifications.

Why is this feature important to you:   We receive 100s of comments a day and while a user is working a task they may receive a comment.  All new comments trigger an email that the assigned user receives and can then ensure they know if any changes are needed.  When the commenter edits their comment to either add information or change their comment completely there are no additional notifications made to the assigned user.  Potentially causing the user working the task to miss instructions/information.

How would you like the feature to work:  Email notification triggered to the assigned user when a user edits their comment.  Email notification should state that "<username> Edited their Comment" and the display the edited comment in the email.

Current Behaviour:  User edits their comment and no email is triggered to the assigned user.