Fix Loading component timeout

Author: WiXSL

packages/ra-ui-materialui/src/layout/Loading.tsx

@@ -9,9 +9,10 @@ export const Loading = (props: LoadingProps) => {
         className,
         loadingPrimary = 'ra.page.loading',
         loadingSecondary = 'ra.message.loading',
+        timeout = 1000,
         ...rest
     } = props;
-    const oneSecondHasPassed = useTimeout(1000);
+    const oneSecondHasPassed = useTimeout(timeout);
     const translate = useTranslate();
     return oneSecondHasPassed ? (
         <Root className={className} {...rest}>
@@ -32,6 +33,7 @@ export interface LoadingProps {
     className?: string;
     loadingPrimary?: string;
     loadingSecondary?: string;
+    timeout?: number;
     sx?: SxProps;
 }