A nice little change was proposed by @supermathie and @sam – indicate the keyboard shortcut for close on our editor education panels:
Since these are desktop only CSS rules they wouldn’t affect mobile, and arguably since more people have the keyboard option on iPad every day, it is still relevant on iPad and other touch devices too.
I think there are other opportunities for ambient indication of return and esc options in the UI, too… but this is the lowest hanging 
