Populate the find field with the search query when URL has #search hash

These changes improves the existing search functionality triggered when
the URL contains a `#search` hash.

In addition to performing the actual search immediately like before,
this will ensure the search text field inside the find bar gets
populated with the text currently being searched for.

web/app.js

@@ -2349,6 +2349,10 @@ function webViewerFindFromUrlHash(evt) {
     highlightAll: true,
     findPrevious: false,
   });
+
+  if (PDFViewerApplication.findBar) {
+    PDFViewerApplication.findBar.findField.value = evt.query;
+  }
 }
 
 function webViewerUpdateFindMatchesCount({ matchesCount }) {