Summary: The styleguide was no longer accessible in Flipper, this diff restores that, and also cleans up the extras menu a bit to by creating a plugin devs only section. Reviewed By: antonk52 Differential Revision: D36697071 fbshipit-source-id: a2abce40157fffd4952172f379c8063492e2dcc0
flipper-ui-core (TBD)
Flipper's UI, agnostic of Electron vs Browser.