Can't fork from history while editing locally

[WardCunningham]

The fork button does nothing from a revision when editing in localStorage. This operation, a fork from history, should update the localStorage with the shortened journal.

Edits made to historical paragraphs are saved as new actions adding to the journal held in localStorage.

I have tested this by editing a page while not logged in to the origin server. The use case would be for someone using a teaching machine, like the MorseCode Plugin, available only on a server they do not own. Once should still be able to set back their local history so as to repeat lessons available to them.

[WardCunningham]

Aside: anyone who would like to try learning code can try here with this machine.
http://asia.wiki.org/about-morseteacher-plugin.html