Fixes initial part with legacy trees and legacy actions - now a modal window can launch - but now we need to get the legacy umb client manager js tree stuff hooked in.

src/Umbraco.Web/Models/Trees/MenuItemExtensions.cs

@@ -28,6 +28,21 @@ namespace Umbraco.Web.Models.Trees
         /// </summary>
         internal const string ActionViewKey = "actionView";
 
+        /// <summary>
+        /// Used to specify the js method to execute for the menu item 
+        /// </summary>
+        internal const string JsActionKey = "jsAction";
+
+        /// <summary>
+        /// Adds the required meta data to the menu item so that angular knows to attempt to call the Js method.
+        /// </summary>
+        /// <param name="menuItem"></param>
+        /// <param name="jsToExecute"></param>
+        public static void LaunchLegacyJs(this MenuItem menuItem, string jsToExecute)
+        {
+            menuItem.SetJsAction(jsToExecute);
+        }
+
         /// <summary>
         /// Sets the menu item to display a dialog based on an angular view path
         /// </summary>
@@ -52,6 +67,11 @@ namespace Umbraco.Web.Models.Trees
             menuItem.SetActionUrl(url);
         }
 
+        private static void SetJsAction(this MenuItem menuItem, string jsToExecute)
+        {
+            menuItem.AdditionalData[JsActionKey] = jsToExecute;
+        }
+
         /// <summary>
         /// Puts a dialog title into the meta data to be displayed on the dialog of the menu item (if there is one)
         /// instead of the menu name

src/Umbraco.Web/Models/Trees/MenuItemList.cs

@@ -169,11 +169,11 @@ namespace Umbraco.Web.Models.Trees
                 if (attribute.MethodName.IsNullOrWhiteSpace())
                 {
                     //if no method name is supplied we will assume that the menu action is the type name of the current menu class
-                    menuItem.AdditionalData.Add("jsAction", string.Format("{0}.{1}", attribute.ServiceName, this.GetType().Name));
+                    menuItem.AdditionalData.Add(MenuItemExtensions.JsActionKey, string.Format("{0}.{1}", attribute.ServiceName, this.GetType().Name));
                 }
                 else
                 {
-                    menuItem.AdditionalData.Add("jsAction", string.Format("{0}.{1}", attribute.ServiceName, attribute.MethodName));
+                    menuItem.AdditionalData.Add(MenuItemExtensions.JsActionKey, string.Format("{0}.{1}", attribute.ServiceName, attribute.MethodName));
                 }
             }
         }