Search: dont adjust height if not rendered

js/src/forum/components/Search.js

@@ -114,6 +114,9 @@ export default class Search extends Component {
     // Highlight the item that is currently selected.
     this.setIndex(this.getCurrentNumericIndex());
 
+    // If there are no sources, the search view is not shown.
+    if (!this.sources.length) return;
+
     // Since extensions might add elements above the search box on mobile,
     // we need to calculate and set the max height dynamically.
     const resultsElementMargin = 14;