Support systems where PHP ext-intl is not installed

Creating a group event returns a fatal error:

Error: Call to undefined function Drupal\social_core\Controller\transliterator_transliterate() in Drupal\social_core\Controller\SocialCoreController->generateAddFormTitle() (line 316 of /var/www/community.livestockdata.org/html/profiles/contrib/social/modules/social_features/social_core/src/Controller/SocialCoreController.php).

transliterator_transliterate() function is provided by php-intl extension, while it is not a requirement.