added command support to toolbar.

UI/Shared/Messenger.js

@@ -0,0 +1,27 @@
+"use strict";
+define(['app'], function () {
+    NzbDrone.Shared.Messenger = {
+        show: function (options) {
+
+            if (!options.type) {
+                options.type = 'info';
+            }
+
+            if (!options.hideAfter) {
+                switch (options.type) {
+                    case 'info':
+                        options.hideAfter = 5;
+                        break;
+                    case 'error':
+                        options.hideAfter = 0;
+                }
+            }
+
+            return  window.Messenger().post({
+                message        : options.message,
+                type           : options.type,
+                showCloseButton: true,
+                hideAfter      : options.hideAfter
+            });
+        }};
+});