Fix crash issue

Author: xcv58

src/js/popup.js

@@ -1,3 +1,4 @@
+import 'chrome-extension-async'
 import React from 'react'
 import { render } from 'react-dom'
 import { Provider } from 'mobx-react'

src/js/stores/AppStore.js

@@ -116,7 +116,7 @@ export default class AppStore {
 
   loadLocalStorage = () => {
     const { draft } = JSON.parse(window.localStorage.getItem(this.domainKey) || '{}')
-    const { hosts } = JSON.parse(window.localStorage.getItem(key) || '{}')
+    const { hosts = [] } = JSON.parse(window.localStorage.getItem(key) || '{}')
     Object.assign(this, { draft, hosts })
   }