My Experiment Session should be persistent

(User Story, To be Fixed , Priority: Medium, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Experiments
Summary: Having my Experiments only in-memory kind of sucks. It should be long-term persistent, so I can take my time about it.
This probably needs to wait until the History features is basically in-place. It implies a secondary version of the History table, for user Experiments.