Made sidebars toggleable

Summary:
Implemented a first button: make main menu collapsible.

Also introduced some additional utilities and hooked up startup performance logging

Reviewed By: cekkaewnumchai

Differential Revision: D23783500

fbshipit-source-id: 2456fd781a52d497facbaccfabe885e4f8c408c5

desktop/app/src/utils/useStore.tsx

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {
+  useSelector,
+  shallowEqual,
+  useDispatch as useDispatchBase,
+} from 'react-redux';
+import {Dispatch} from 'redux';
+import {State, Actions} from '../reducers/index';
+
+/**
+ * Strongly typed wrapper or Redux's useSelector.
+ *
+ * Equality defaults to shallowEquality
+ */
+export function useStore<Selected>(
+  selector: (state: State) => Selected,
+  equalityFn: (left: Selected, right: Selected) => boolean = shallowEqual,
+): Selected {
+  return useSelector(selector, equalityFn);
+}
+
+/**
+ * Strongly typed useDispatch wrapper for the Flipper redux store.
+ */
+export function useDispatch(): Dispatch<Actions> {
+  return useDispatchBase();
+}