At risk notificaiton

1. I would like to add the criteria which Reveiwer & Apporver can receiver At risk notification even if they don't open the viewer.

As one of the criteria to receive the At risk notification, Reviewer & Approver need to open the proofing viewer before reached at risk time. I think that it is very severe as criteria to receive it.

2. I would like to send At risk notification to Guest member as well