Improve settings window and cleanup

assets/js/common.js

@@ -3,6 +3,7 @@
  * 
  * @param {} title
  * @param {} message
+ * @param {} icon
  */
 var message = function(title, message, icon) {
     Ext.Msg.show({
@@ -15,11 +16,26 @@ var message = function(title, message, icon) {
     });
 };
 
-var settings = new SettingsWindow();
+/**
+ * Logs the user out.
+ */
+var logout = function() {
+    Ext.Ajax.request({
+        url: BASE_URL + 'auth/logout',
+        method: 'post',
+        success: function(xhr) {
+            window.location = BASE_URL + 'auth/login';
+        }
+    });
+};
 
 /**
  * Application main entry point
  */
 Ext.onReady(function() {
     Ext.QuickTips.init();
+
+    if (typeof(SettingsWindow) == "function") {
+    	settings = new SettingsWindow();
+    }
 });