[TASK] Stabilize ac test Frontend\IndexedSearchCest

Fails locally occasionally. The additional explicit
waitForElement() before clicking the elemnt
stabilized it.

Resolves: #101491
Releases: main, 12.4, 11.5
Change-Id: I4072daa0e949d3480f399e99a2f35d8ef889eded
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80251
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>

typo3/sysext/core/Tests/Acceptance/Application/Frontend/IndexedSearchCest.php

@@ -37,6 +37,7 @@ public function _before(ApplicationTester $I, PageTree $pageTree): void
         $I->waitForElement('#typo3-pagetree-tree .nodes .node', 5);
         $pageTree->openPath(['styleguide frontend demo']);
         $I->switchToContentFrame();
+        $I->waitForElementVisible('.t3js-module-docheader-bar a[title="View webpage"]');
         $I->click('.t3js-module-docheader-bar a[title="View webpage"]');
         $I->executeInSelenium(static function (RemoteWebDriver $webdriver) {
             $handles = $webdriver->getWindowHandles();