Gets the related links editor working with the old property value converter too, udpates the install script so that works and updates tests to reference the correct one, adds GUID overloads to the UrlProvider

src/Umbraco.Core/StringUdi.cs

@@ -1,10 +1,12 @@
 using System;
+using System.ComponentModel;
 
 namespace Umbraco.Core
 {
     /// <summary>
     /// Represents a string-based entity identifier.
     /// </summary>
+    [TypeConverter(typeof(UdiTypeConverter))]
     public class StringUdi : Udi
     {
         /// <summary>