Bugfixes..

- ModelsBuilder: Inject PublishedValueFallback into static Mixins
- ModelsBuilder: Throw exception if compiler can't compile the code
- CheckIfUserTicketDataIsStaleAttribute: Scope issue
- Ambiguous Actions: Couldn't determine the action when empty arrays was passed. Fixed by using more v8 like solution. (Still stupid the client not just have different endpoints)
- Fixed issue with reading the body from post requests. Often we where not allowed to seek in the stream.
- UmbracoHelper: Made available on UmbracoViewPage
- Client entity.resource.js: Don't ask server when getByIds has 0 ids.
- Client content.resource.js: Renamed endpoint GetEmptyBlueprint to avoid ambiguous action name

src/Umbraco.Web.Common/DependencyInjection/UmbracoBuilderExtensions.cs

@@ -52,6 +52,7 @@ using Umbraco.Web.Macros;
 using Umbraco.Web.Security;
 using Umbraco.Web.Telemetry;
 using Umbraco.Web.Templates;
+using Umbraco.Web.Website;
 using IHostingEnvironment = Umbraco.Core.Hosting.IHostingEnvironment;
 
 namespace Umbraco.Web.Common.DependencyInjection
@@ -275,6 +276,8 @@ namespace Umbraco.Web.Common.DependencyInjection
 
             builder.Services.AddSingleton<ContentModelBinder>();
 
+            builder.Services.AddScoped<UmbracoHelper>();
+
             builder.AddHttpClients();
 
             // TODO: Does this belong in web components??