fix(settings): check if activeSectionId and activeSectionType are defined before using them

Closes #41513

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

apps/settings/templates/settings/frame.php

@@ -84,6 +84,6 @@ script('files', 'jquery.fileupload');
 		</ul>
 	</nav>
 </div>
-<div id="app-content" data-active-section-id="<?php print_unescaped($_['activeSectionId']) ?>" data-active-section-type="<?php print_unescaped($_['activeSectionType']) ?>">
+<div id="app-content" <?php if (!empty($_['activeSectionId'])) { ?> data-active-section-id="<?php print_unescaped($_['activeSectionId']) ?>" <?php } if (!empty($_['activeSectionType'])) { ?> data-active-section-type="<?php print_unescaped($_['activeSectionType']) ?>" <?php } ?>>
 	<?php print_unescaped($_['content']); ?>
 </div>