Updated the data type controller post method and moved validation, etc... over to a filter, updated data type tree with the create menu action to launch into a blank element.

src/Umbraco.Web/Trees/Menu/CreateChildEntity.cs

@@ -0,0 +1,10 @@
+namespace Umbraco.Web.Trees.Menu
+{
+    /// <summary>
+    /// Represents the refresh node menu item
+    /// </summary>
+    [ActionMenuItem("umbracoMenuActions")]
+    public sealed class CreateChildEntity : ActionMenuItem
+    {
+    }
+}

src/Umbraco.Web/Trees/Menu/RefreshNode.cs

@@ -1,10 +1,10 @@
-namespace Umbraco.Web.Trees.Menu
-{
-    /// <summary>
-    /// Represents the refresh node menu item
-    /// </summary>
-    [ActionMenuItem("umbracoMenuActions")]
-    public sealed class RefreshNodeMenuItem : ActionMenuItem
-    {        
-    }
+namespace Umbraco.Web.Trees.Menu
+{
+    /// <summary>
+    /// Represents the refresh node menu item
+    /// </summary>
+    [ActionMenuItem("umbracoMenuActions")]
+    public sealed class RefreshNode : ActionMenuItem
+    {        
+    }
 }