Diff and update mobile configs

Summary:
This diff makes it possible to apply MC's to a currently running as part of the support form process.

Things _NOT_ done in the diff:

* make sure getUniverses and getGatekeepers returns valid configs (this broke since somewhere last week, opened T57918601 for that. However, before that this worked correctly
* provide a more interactive UI when applying MC's, such as beeing able to see a diff preview, ask confirmation before overriding current config, etc

Reviewed By: jknoxville

Differential Revision: D18452172

fbshipit-source-id: da3f24bccf88260282f86e2564e983a9ee217c2f

src/chrome/MainSidebar.tsx

@@ -30,9 +30,9 @@ import {
   LoadingIndicator,
   Button,
   StarButton,
-  ArchivedDevice,
   Heading,
   Spacer,
+  ArchivedDevice,
 } from 'flipper';
 import React, {Component, PureComponent, Fragment} from 'react';
 import NotificationsHub from '../NotificationsHub';