Wrote the comment entirely with my keyboard after I decided that would be a good idea, and found another issue: we need a shortcut to focus the composer textarea. It was extremely annoying to get my focus back in the composer, especially because it’s not where I expected it to be in the taborder.
@riking this looks awesome! It looks like you have a better understanding than I do of how to implement these changes within Discourse, but the gist of these changes look great to me. Let me know if I can help at all!