Changes the Preview Index.cshtml to use a real model instead of viewdata, adds the correct razor web.config for these preview views, changes the enabled feature to be able to inject a razor view instead of strings

src/Umbraco.Web/Models/ContentEditing/AuditLog.cs

@@ -6,6 +6,7 @@ using Umbraco.Core.Models;
 
 namespace Umbraco.Web.Models.ContentEditing
 {
+
     [DataContract(Name = "auditLog", Namespace = "")]
     public class AuditLog
     {
@@ -31,4 +32,4 @@ namespace Umbraco.Web.Models.ContentEditing
         [DataMember(Name = "comment")]
         public string Comment { get; set; }
     }
-}
+}

src/Umbraco.Web/Models/ContentEditing/BackOfficePreview.cs

@@ -0,0 +1,11 @@
+namespace Umbraco.Web.Models.ContentEditing
+{
+    /// <summary>
+    /// The model representing Previewing of a content item from the back office
+    /// </summary>
+    public class BackOfficePreview
+    {
+        public string PreviewExtendedView { get; set; }
+        public bool DisableDevicePreview { get; set; }
+    }
+}