[SHOPTIME-3488] Detail Page 진입 시 제목 표시줄에 일시적으로 false, undefined 등이 표시됨

[수정 파일]
1. THeader.jsx
 
[수정 내용]
title이 존재시에만 렌더링 되도록 변경.

com.twin.app.shoptime/src/components/THeader/THeader.jsx

@@ -2,10 +2,8 @@ import React, { useCallback } from "react";
 
 import classNames from "classnames";
 
-import { Marquee, MarqueeController } from "@enact/sandstone/Marquee";
-import SpotlightContainerDecorator, {
-  spotlightDefaultClass,
-} from "@enact/spotlight/SpotlightContainerDecorator";
+import { Marquee } from "@enact/sandstone/Marquee";
+import SpotlightContainerDecorator from "@enact/spotlight/SpotlightContainerDecorator";
 import Spottable from "@enact/spotlight/Spottable";
 
 import { $L } from "../../utils/helperMethods";