Allow to have empty page titles

Author: javiereguiluz

src/Dto/CrudDto.php

@@ -163,7 +163,7 @@ public function getCustomPageTitle(string $pageName = null, $entityInstance = nu
             $title = null !== $entityInstance ? $title($entityInstance) : $title();
         }
 
-        if (null === $title || '' === $title) {
+        if (null === $title) {
             return null;
         }