Take advantage of notes as separators

[juanignaciosl]

I use the notes for context and separators, so...

• [x] I'd like to keep them as small as possible, so removing the "added by " would be nice.
• [x] Having a light grey background might help to distinguish them from issues 🙏
• [ ] Substracting them from the header count would make limits easier to honor.

[javitonino]

First two things done in https://github.com/javitonino/grease/commit/4c3ffddab31fd32167d060ce4c365db2c0b63134

Third thing is probably asking too much (it would interfere with GH live update script), but I'll take a look.

[juanignaciosl]

Had to try 😅

Thanks!!! ❤️