Comment 2 for bug 1374674

To deal with not getting any more comment notifications again - seen as one can't un-subscribe to comments I propose this:

1) I comment on something and the system records I'm interested in the view/artefact's comments

2) When the next user comments on view/artefact it sends me an email notification

3) If I go to view the view/artefact again (as logged in user) in my browser the system again records I'm interested in the view/artefact's comments (whether I choose to comment this time or not)

4) When the next user comments on view/artefact it sends me an email notification I'm sent another email

5) But if I never visit the view/artefact again after getting my email I never receive another comment notification from that view/artefact again.