fixes up legacy trees with the correct alias and forces legacy root nodes to load the dashboard route.

src/Umbraco.Web.UI.Client/src/common/services/tree.service.js

@@ -29,6 +29,8 @@ function treeService($q, treeResource, iconHelper, notificationsService, $rootSc
                     if (treeNodes[i].metaData && treeNodes[i].metaData["treeAlias"]) {
                         //this is a root node
                         treeNodes[i].routePath = section;
+                        //we're going to remove any js callbacks from legacy tree nodes here!
+                        treeNodes[i].metaData["jsClickCallback"] = null;
                     }
                     else {
                         var treeAlias = this.getTreeAlias(treeNodes[i]);

src/Umbraco.Web/Trees/ApplicationTreeController.cs

@@ -139,7 +139,7 @@ namespace Umbraco.Web.Trees
                 {
                     Children = legacyAttempt.Result
                 };
-                sectionRoot.AdditionalData.Add("treeType", Type.GetType(configTree.Type).FullName);
+                sectionRoot.AdditionalData.Add("treeAlias", configTree.Alias);
                 return sectionRoot;
             }
 

src/Umbraco.Web/Trees/LegacyTreeDataConverter.cs

@@ -284,7 +284,7 @@ namespace Umbraco.Web.Trees
             };
             if (isRoot)
             {
-                node.AdditionalData.Add("treeType", xmlTreeNode.TreeType);    
+                node.AdditionalData.Add("treeAlias", xmlTreeNode.TreeType);
             }
 
             //This is a special case scenario, we know that content/media works based on the normal Belle routing/editing so we'll ensure we don't