There is a code review (split view) feature. Which is nice. But then when I see a change I want to stage and right click the blue bar in the gutter next to the change, I'm only presented with the option to discard the change, nothing else.
So in order to stage I either have to go to the source control window (accessed via the project navigator) or close the code review tool, stage, and then go back to the code review tool.