'Top/Most Helpful Comments' on issues #1898

Hey!

Often, when debugging problems we run into when using open source tools, we end up on a relevant GitHub issue of the repository in question. These issues sometimes contain solutions to the problems in the comments, and users react to the most helpful comments using the 👍 and 🎉 reactions.

I think a feature which would highlight the comments with a large amount of 👍 and 🎉 would be really useful for quickly finding the most useful comments out of an issue. So instead of having to scroll through all of the comments, a user who ends up on the issue-page could instantly see the most 'upvoted' comments which most likely contain the information they are looking for.

You could think of this rather similarly to Stack Overflow answers. Stack Overflow sorts the answers by having the most helpful ones at the top. But we probably don't want to sort the comments, since that could be very confusing for the user.

Thus, I think a good option might be to have a small list of 'top comments' somewhere at the top of an issue-page, which would contain a small snippet of the comment (e.g. first 50 characters), and by clicking the comment listed there it would scroll the user to the full comment.

If people agree that this would be a good feature, I could try to sketch a UI for it and make a PR :)