Recipe Change Log

[rehandalal]

Copied from: mozilla/normandy#980

Description
Provide users with a page showing the changes that took place between revisions. This could also be used on the Approval History page, showing the changes between approval requests.

Goal

• Establish a historical context for users approaching a recipe they're unfamiliar with.
• Provides an easy-to-follow 'paper trail' of changes.

Level of Effort
Low+. Diffing recipes is easy, the hard part is designing the UI.

[rehandalal]

Copied from: mozilla/normandy#980 (comment)

I had a prototype of this working on the old UI, but I can't get that branch running to take a screenshot of it for the ticket.

I did manage to find this screenshot demonstrating how this could be applied to the History Timeline:

The +1/2 Changes links here were expandable to show which fields were updated. Then, you would go to another page to see what the actual value changes were.