UX improvements to Notifications

[nickytonline]

Disregard this discussion. I meant to open it in the https://github.com/open-sauced/app repository. I've moved it to open-sauced/app#1615

Notifications work well, but one thing I noticed when someone posts several highlights is it's just noise as the notifications say the same thing.

For example in this screen shot, user CBID2 posted seven highlights, but the notification message is the same.

I'm wondering if we could group them to say user CBID2 posted seven highlights, or surface more information about the specific highlight like the the title of the highlight or the associated PR/issue for the highlight.

Thoughts?