Added LayoutSaving call to context in WidgetElementHarvester to properly update the container of widgets. (#8534)

src/Orchard.Web/Modules/Orchard.Widgets/Layouts/Providers/WidgetElementHarvester.cs

@@ -47,11 +47,30 @@ namespace Orchard.Widgets.Layouts.Providers {
                     Importing = ImportElement,
                     StateBag = new Dictionary<string, object> {
                         { "ContentTypeName", contentTypeDefinition.Name }
-                    }
+                    },
+                    LayoutSaving = LayoutSaving
                 };
             });
         }
 
+        private void LayoutSaving(ElementSavingContext context) {
+            // I need to save the widget element container.
+            var element = (Widget)context.Element;
+            if (element == null) {
+                return;
+            }
+            var widgetId = element.WidgetId;
+            var widget = _contentManager.Value.Get(widgetId.Value, VersionOptions.Latest);
+            if (widget == null) {
+                return;
+            }
+
+            var commonPart = widget.As<ICommonPart>();
+            if (commonPart != null) {
+                commonPart.Container = context.Content;
+            }
+        }
+
         private void Displaying(ElementDisplayingContext context) {
             var contentTypeName = (string)context.Element.Descriptor.StateBag["ContentTypeName"];
             var element = (Widget)context.Element;