In Story Engine, Allow Us To "Resume" prose that's been completed.

If possible, I think there should be an option to resume prose that's been completed. As it is I have to stop the prose in order to make edits to the beats, and then if I want it to re-generate prose that's already been written, I can use the history fuction to roll back to an earlier beat and let it continue. Even if I accidentally let the prose generate all the beats that is currently there, I should be allowed to write new beats or roll back to previous beats and have the prose pick up from there.