fixed status update of tutorials

src/reducers/tutorialReducer.js

@@ -1,8 +1,11 @@
 import { TUTORIAL_SUCCESS, TUTORIAL_ERROR, TUTORIAL_CHANGE } from '../actions/types';
 
+import { tutorials } from '../components/Tutorial/tutorials';
 
 const initialState = {
-  status: JSON.parse(window.localStorage.getItem('tutorial')),
+  status: window.localStorage.getItem('tutorial') ?
+            JSON.parse(window.localStorage.getItem('tutorial'))
+          : new Array(tutorials.length).fill({}),
   change: 0
 };
 
@@ -10,6 +13,8 @@ export default function(state = initialState, action){
   switch(action.type){
     case TUTORIAL_SUCCESS:
     case TUTORIAL_ERROR:
+      // update locale storage - sync with redux store
+      window.localStorage.setItem('tutorial', JSON.stringify(action.payload));
       return {
         ...state,
         status: action.payload