Ref T9132. Fixes T4580. Thhat might actually have been fixed a while ago or something since it describes a buggy/bad interaction which doesn't reproduce for me at HEAD.

This saves and restores all the stacked actions (subscribers, projects, etc) so that you don't lose anything if you close a window by accident.

Added a bunch of actions in various states, reloaded the page, draft stuck around.

Submitted form, actions didn't stick around anymore.