Add missing TS type in UserAccount (#1063)

Summary:
Adds missing TS for Store type in `react-redux` `connect`, same as in other components.
Forgot to add in https://github.com/facebook/flipper/issues/1062

## Changelog

Internal change: Typescript typings improved.
Pull Request resolved: https://github.com/facebook/flipper/pull/1063

Test Plan: Try to compile/do a type check.

Reviewed By: nikoant

Differential Revision: D21278326

Pulled By: passy

fbshipit-source-id: c8e8e18c3c6d5f8904e97228540d4d7c4274124f

desktop/app/src/chrome/UserAccount.tsx

@@ -19,6 +19,7 @@ import {findDOMNode} from 'react-dom';
 import React, {PureComponent} from 'react';
 import {getUser} from '../fb-stubs/user';
 import config from '../fb-stubs/config';
+import {State as Store} from '../reducers';
 
 const Container = styled(FlexRow)({
   alignItems: 'center',
@@ -125,8 +126,6 @@ class UserAccount extends PureComponent<Props> {
   }
 }
 
-// @TODO: TS_MIGRATION
-type Store = any;
 export default connect<StateFromProps, DispatchFromProps, OwnProps, Store>(
   ({user}) => ({
     user,