Since when do pending suggested edit review item show up in my new toolbar?
And is it only for suggested edits?
It got added as part of a feature request on Meta. I asked one of the guys to help me dig it up: Bring back review numbers to the top bar
The accepted answer was posted on the 17th, so I assume that's around when it started. It also adds that the item is for suggested edits only, but they may roll out a new thing after New Year's that is more generalized.