Catch undefined Notification for IE

Notification is not defined on IE.
Also it is better to put javascript in the js files.

issue7683
review54341002

src/bus.js

@@ -59,7 +59,12 @@
 
     Sao.Bus.handle = function(message) {
         var notify = function(message) {
-            if (Notification.permission != "granted") {
+            try {
+                if (Notification.permission != "granted") {
+                    return;
+                }
+            } catch (e) {
+                (console.error || console.log).call(console, e, e.stack);
                 return;
             }
 

src/sao.js

@@ -1003,6 +1003,12 @@ var Sao = {};
 
     jQuery(document).ready(function() {
         set_shortcuts();
+        try {
+            Notification.requestPermission();
+        } catch (e) {
+            (console.error || console.log).call(console, e, e.stack);
+        }
+        Sao.login();
     });
 
     function set_shortcuts() {