Test for microsoft/vscode-pull-request-github#546

• macOS @isidorn
• linux @Tyriar
• windows @gregvanl

Authors: @RMacfarlane, @queerviolet, @rebornix

The GitHub Pull Request extension now supports grouping comments into a review instead of just adding them individually. You should be able to

• Start a review when leaving a comment in the editor, both when browsing PRs in the tree and when a PR is actually checked out
• Add additional comments to the review
• Submit or delete the review, from the editor and the description webview of the PR
• See a complete view of all pending comments on the description webview
• Edit and delete pending comments
• Make changes or start a pending review on github.com and see them reflected in the extension

Please use the nightly build of the extension to test, and file issues at https://github.com/Microsoft/vscode-pull-request-github. You can use this repo for testing

Complexity: 4