Cleanup config and xmlmenu hooks
Related to !3 but should be independent, this fixes a fatal with smarty5 templates
PHP Fatal error: Uncaught Error: Cannot access protected property Smarty\Smarty::$template_dir in civicrm/packages/smarty5/Smarty.php:37
Stack trace:
#0 ext/civimobile/civimobile.php(20): Smarty->__get()