Feature request: Inline notes for other fields

We would like to be able to put text in notes mode beyond the article body field. This would include: summaries, photo captions, infoboxes (all related content), description fields in other types of assets, etc.

1) What problem(s) does this idea solve? Why do you need this idea implemented? Provide as many problems or use cases as possible.

We use notes mode internally for a lot of things, and the ability to mark things as notes in other fields would improve our communication and editing across the newsroom.

2) How often would you use this feature?

Daily, with all assets.

3) How many people in your organization would use this feature?

Everyone, but it's particularly helpful for photographers (10-15) and our copy editors (10-15)