Enhance PageRevision to include release notes

[kutenai]

Adding an RFC on a request to enhance the current revision system to include an optional ability to replace the current model with one that includes release notes.

[lb-]

Just a thought, maybe Workflow makes some of this functionality possible through comments on approval/steps.

Maybe it's worth reviewing this RFC on the context of what's available now. Additionally, the page status sidebar opens up some UI space for links or content on the sidebar to be visible more easily.