For the first feature request, there’s an existing one 
For the second part — revisions! Nice idea. I know this can be natively done in macOS (like iA Writer does), so this seems like a not too-far-stretched plugin idea, too.
For the first feature request, there’s an existing one
For the second part — revisions! Nice idea. I know this can be natively done in macOS (like iA Writer does), so this seems like a not too-far-stretched plugin idea, too.