Tag All Users on Proof Comment

Description - It would be so helpful if there was a way to quickly tag all users on a proof in a comment. Right now, you have to manually type out their names on each comment and sometimes, I have proofs with 10+ people on them and need to enter several comments for all of those people. 

Why is this feature important to you - It would help save time.

How would you like the feature to work - Maybe if you type something like @2008903-users or something similar that can pop-up in a dropdown after that as an option, Workfront would auto-add all of the names on the current proof to the comment. I'm a UX Designer so always looking for ways to optimize my time!

Current Behaviour - You have to manually type each person's name and then select it from the drop-down on each comment.