Proper timeline rewind model

[Tristan971]

Is your feature request related to a problem? Please describe. Right now the timeline is organized as a list when it should be some sort of graph for rewind purposes.

Describe the solution you'd like A decent linear graph approach to history management. With proper history saving in database.

Describe alternatives you've considered Not doing it. Might be hard. Will need help if we go through with it.

Additional context From : https://twitter.com/Kazquo/status/1049072713292292097