Change Details

This will require API design for batch deletion for the Catalyst API and updates to `delete.php`.

This will require API design for batch deletion for the Catalyst API (initially, trying to delete in a loop with a batched call to the API). The initial scope is Catalyst-only.

This will require API design for batch deletion for the Catalyst API and updates to `delete.php`(initially, trying to delete in a loop with a batched call to the API). The initial scope is Catalyst-only.