There was some work done by Marco around creating a history panel in the admin-console but unfortunately it's incomplete as of now.
Marco's patches can be found here:
It would be great either to complete the support for historical view of the document at sometime in the future.
Created attachment 140380 [details]
current state of the history view
Kendy: Any thoughts on it?
This can be floated as one of the GSoC tasks if it's worthy enough?