GUAC-1376: Add logout action to disconnect/error notification in client.

guacamole/src/main/webapp/app/client/controllers/clientController.js

@@ -130,6 +130,19 @@ angular.module('client').controller('clientController', ['$scope', '$routeParams
         0x0308: true
     };
 
+    /**
+     * Action which logs out from Guacamole entirely.
+     */
+    var LOGOUT_ACTION = {
+        name      : "CLIENT.ACTION_LOGOUT",
+        className : "logout button",
+        callback  : function logoutCallback() {
+            authenticationService.logout()['finally'](function logoutComplete() {
+                $location.url('/');
+            });
+        }
+    };
+
     /**
      * Action which returns the user to the home screen. If the home page has
      * not yet been determined, this will be null.
@@ -447,9 +460,9 @@ angular.module('client').controller('clientController', ['$scope', '$routeParams
         // Build array of available actions
         var actions;
         if (NAVIGATE_HOME_ACTION)
-            actions = [ NAVIGATE_HOME_ACTION, RECONNECT_ACTION ];
+            actions = [ NAVIGATE_HOME_ACTION, RECONNECT_ACTION, LOGOUT_ACTION ];
         else
-            actions = [ RECONNECT_ACTION ];
+            actions = [ RECONNECT_ACTION, LOGOUT_ACTION ];
 
         // Get any associated status code
         var status = $scope.client.clientState.statusCode;