add back order to custom view container

fixes #90232

src/vs/workbench/api/browser/viewsExtensionPoint.ts

@@ -314,6 +314,7 @@ class ViewsExtensionHandler implements IWorkbenchContribution {
 					[id, `${id}.state`, { mergeViewWithContainerWhenSingleView: true }]
 				),
 				hideIfEmpty: true,
+				order,
 				icon,
 			}, ViewContainerLocation.Sidebar);