Summary:
This diff makes sure Sandy plugins show up as well in the plugin selector when making exports (and in support form as well).
Also verified that this works with the Sandy updated section plugin.
Note that persisted state now didn't need any changes in the plugin code to work :)
Commented / simplified the calculation of available plugins a little bit and fixed a confusing issue where two different redux stores where created in one unit test, which caused an issue in the new implementation.
Reviewed By: jknoxville
Differential Revision: D22434301
fbshipit-source-id: c911196bc5b105309e82204188f124f40aab487a
6fe477f19b