Read only fields

Closes #3094098

src/Plugin/FieldPermissionType/CustomAccess.php

@@ -31,9 +31,9 @@ class CustomAccess extends Base implements CustomPermissionsInterface, AdminForm
 
     $field_name = $this->fieldStorage->getName();
     if ($operation === 'edit' && $entity->isNew()) {
-      return $account->hasPermission('create ' . $field_name);
+      return $account->hasPermission('create ' . $field_name) || $account->hasPermission('create read-only ' . $field_name);
     }
-    if ($account->hasPermission($operation . ' ' . $field_name)) {
+    if ($account->hasPermission($operation . ' ' . $field_name) || $account->hasPermission($operation . ' read-only ' . $field_name)) {
       return TRUE;
     }
     else {