PR approvals aren't very obvious 

https://github.com/Microsoft/vscode/issues/57301

Also note there are two types, collaborator/owner approvals and contributor/external approvals.

<img width="365" alt="screen shot 2018-08-28 at 11 35 12 am" src="https://user-images.githubusercontent.com/2193314/44743123-7811c380-aab6-11e8-821b-2e7b18f1f7cc.png">
