Hide download all link when no documents
Hide download all link when no documents

Why are we doing this:
- the download all link should only be visible if there are downloads

What this PR does:
- hides the link when no docs

ministryofjustice/advocate-defence-payments,ministryofjustice/advocate-defence-payments,ministryofjustice/advocate-defence-payments,ministryofjustice/advocate-defence-payments