Sometimes a conversation in an issue or a pull request can move off in a tangental direction. Now you can click Open new issue within the comment’s options menu to open a new issue which will include a reference to the original comment – helping you get the conversation back on track.
This creates the ability to do a direct “two dot” comparison between two commits. Now you can easily see the differences between two commits without comparing from their common merge base commit like a three dot comparison would.