Provide option to only show notifications for @mentions

I need a way to isolate items (initiativies, features, or requirements, etc.) that I have been @mentioned on. Right now, notifications come up for updates to watched items or others I am a participant in. I participate in a LOT of things.

I need to be able to pick out when I've been specifically called out so I can make sure I address whatever it is. Currently, there is no way for me to see just features (or other items) that I have been @mentioned in. Which means I spent way too much time going through the Notifications page or miss things.