Homestyx hydra

R1:273e22d59f87

Save stacked actions in drafts, not just comments

Summary:
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.

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

Submitted form, actions didn't stick…
Repository: R1 hydra
Commit Date: Dec 4 2015