Added a util function that checks that local/session storage is enabled. Also added tests using this function to report an error to the user if it is not enabled

web/react/utils/utils.jsx

@@ -96,6 +96,21 @@ module.exports.getCookie = function(name) {
   if (parts.length == 2) return parts.pop().split(";").shift();
 }
 
+module.exports.isLocalStorageSupported = function() {
+    try {
+        sessionStorage.setItem("testSession", '1');
+        sessionStorage.removeItem("testSession");
+
+        localStorage.setItem("testLocal", '1');
+        localStorage.removeItem("testLocal", '1');
+
+        return true;
+    } 
+    catch (e) {
+        return false;
+    }
+}
+
 module.exports.notifyMe = function(title, body, channel) {
   if ("Notification" in window && Notification.permission !== 'denied') {
     Notification.requestPermission(function (permission) {