Single post in Small Addition to the Coding Box

I just want to expand a bit on this. I use a laptop computer and the only time the little notch thing is in the corner is if I diable the editor. I would definitely like the option to do the same thing with the editor on. Without the editor on, it's harder for me to figure out which part is css and what part is just regular text or a comment at a glance. So if this could be implemented on mobile and with the editor on that would be fantastic.