Issue Type: Feature Request

It would be helpful to see the ids of the PRs to be able to quickly spot the sorting order of PRs.

Extension version: 0.1.6
VS Code version: Code - Insiders 1.28.0-insider (60db21f08b81f03c15bb5c9395755ad3620a62bd, 2018-10-02T13:19:14.638Z)
OS version: Darwin x64 16.7.0