Summary:
This diff moves the dialogs
* Settings
* Plugin Manager
* Doctor
* Sign in
* Changelog
To use the imperative dialog APIs, rather then organising them through reducers which adds a lot of indirection which isn't really needed but hard to follow.
Reviewed By: passy
Differential Revision: D30192002
fbshipit-source-id: ba38b2e700da3e442653786448fcbf85074981ad
9e5575cf69