Issue #3485183: Make reloadPage() a protected method.

Change reloadPage() method from public to protected.

src/Controller/NavigationExtraToolsController.php

@@ -90,7 +90,7 @@ final class NavigationExtraToolsController extends ControllerBase {
   /**
    * Reload the previous page.
    */
-  public function reloadPage() {
+  protected function reloadPage() {
     $request = $this->requestStack->getCurrentRequest();
     if ($request->server->get('HTTP_REFERER')) {
       return $request->server->get('HTTP_REFERER');