ISTWCMS-6992: Add contacts classes to the block twig based on contact.style

templates/blocks/block.html.twig

@@ -30,6 +30,7 @@
   'block',
   'block-' ~ configuration.provider|clean_class,
   'block-' ~ plugin_id|clean_class,
+   configuration.contact.style ? 'block-' ~ configuration.contact.style|clean_class,
 ]
 %}