Set ListPart property on ListPartViewModel

closes OrchardCMS#15558

src/OrchardCore.Modules/OrchardCore.Lists/Drivers/ListPartDisplayDriver.cs

@@ -155,6 +155,7 @@ private ShapeResult InitializeDisplayListPartDisplayShape(ListPart listPart, Bui
                 model.ContainedContentTypeDefinitions = await GetContainedContentTypesAsync(settings);
                 model.Context = context;
                 model.Pager = await context.New.PagerSlim(pager);
+                model.ListPart = listPart;
             })
                 .Location("Detail", "Content:10");
         }