Issue Summary missing from the Subject Email Notification

Summary:

The Notification Email Subject for comment event only include Issue Key.

Steps to Reproduce:

1. Create a Service Desk Project.
2. Raise a request as a Customer with a legit Email Address.
3. Assign the ticket to an Agent.
4. Let the Agent comment on the ticket.
5. Wait for the Email Notification to sent to the Customer/Reporter mail inbox

Expected Result:

• The Notification email will include the Issue Key and Issue Summary on its subject.

Actual Result:

• The Notification Email did not include Issue Summary.

Notes:

• Based on the Release Notes there is no statement about the details about Mail Template changes.
• As in version prior to JSD 3.x the summary is included, it could be said that it is a regression for this version.
• There is a customer that rely on the Issue Key and Issue Summary of the Mail Notification to do other operation.