Refs: microsoft/vscode-pull-request-github#2478

• macOS @sandy081
• linux @roblourens
• windows @misolori

Complexity: 3

Create Issue

Please use the nightly version of the GitHub Pull Requests and Issues extension to test.

The commenting logic for the extension has been refactored this iteration, verify that there are no regressions. Test that you're able

• Add new single comments to files
• Add new comments with start review
• Reply to comments with both single comments and reviews

Check both commenting on checked out pull requests, and pull requests from the PR tree.