abstracts out the DocumentType, MemberType and MediaType editor models, since some contain different props than each other and now member properties contain different properties than each other. So we have a lot of generic insanity going on... it works though.

src/Umbraco.Web/Models/Mapping/PropertyGroupDisplayResolver.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+using System.Linq;
+using AutoMapper;
+using Umbraco.Web.Models.ContentEditing;
+
+namespace Umbraco.Web.Models.Mapping
+{
+    internal class PropertyGroupDisplayResolver<TSource, TPropertyTypeDisplay> : ValueResolver<IEnumerable<TSource>, IEnumerable<PropertyGroupDisplay<TPropertyTypeDisplay>>>
+        where TSource : ContentTypeSave 
+        where TPropertyTypeDisplay : PropertyTypeDisplay
+    {
+        protected override IEnumerable<PropertyGroupDisplay<TPropertyTypeDisplay>> ResolveCore(IEnumerable<TSource> source)
+        {
+            return source.Select(Mapper.Map<PropertyGroupDisplay<TPropertyTypeDisplay>>);
+        }
+    }
+}