Fix system tests when adding modal (#53)

* Fix system tests when adding modal

joomla/joomla-cms#23756

* Ensure the modal loads

Author: wilsonge

src/acceptance/administrator/components/com_media/MediaListCest.php

@@ -344,6 +344,8 @@ public function deleteSingleFileUsingToolbar(\Step\Acceptance\Administrator\Medi
 		$I->waitForElement($testFileItem);
 		$I->click($testFileItem);
 		$I->click(MediaListPage::$toolbarDeleteButton);
+		$I->waitForElement(MediaListPage::$toolbarModalDeleteButton);
+		$I->click(MediaListPage::$toolbarModalDeleteButton);
 		$I->seeSystemMessage('Item deleted.');
 		$I->waitForElementNotVisible($testFileItem);
 		$I->dontSeeElement($testFileName);