Internal comments should only be viewable by specific users from JIRA

Issue Sumary
When an SD project is set to viewable by anonymous via project permission, internal comments are also viewable.

Steps to Reproduce

1. Create a Service Desk project.
2. Create an issue in the project.
3. Add an internal comment into the project.
4. Add group "Anyone" to the project's Browse issue permission.
5. Access the Search issue page and find issues within that project.
6. View the issue you created.

Expected Result
JIRA would allow users veiw issue showing all unhidden comments but hide internal comments similar to restricted comments in JIRA.

Actual Result
Anonymous user sees all comments in the issue.