Summary:
*Stack summary*: this stack refactors plugin management actions to perform them in a dispatcher rather than in the root reducer (store.tsx) as all of these actions has side effects. To do that, we store requested plugin management actions (install/update/uninstall, star/unstar) in a queue which is then handled by pluginManager dispatcher. This dispatcher then dispatches all required state updates.
*Diff summary*: refactored "load plugin" operation to perform it in pluginManager dispatcher.
Reviewed By: mweststrate
Differential Revision: D26166654
fbshipit-source-id: e1fe48fa2cfc5533ad4f801ca56f00fc2ca3f4c4
0b803f810e