fix(Search): fix an error when showNoResults=false and arrow down is pressed (#3938)

Co-authored-by: Oleksandr Fediashov <alexander.mcgarret@gmail.com>

Author: ysugimoto

src/modules/Search/Search.js

@@ -328,6 +328,8 @@ export default class Search extends Component {
     // Do not access document when server side rendering
     if (!isBrowser()) return
     const menu = document.querySelector('.ui.search.active.visible .results.visible')
+    if (!menu) return
+    debug(`menu (results): ${menu}`)
     const item = menu.querySelector('.result.active')
     if (!item) return
     debug(`menu (results): ${menu}`)