Pipelines without artifacts show a blank dropdown on pipelines table page

Proposal

On the pipelines table page, each pipeline has a column with a dropdown for artifacts. That dropdown shows up on every row regardless of whether it has any artifacts or not (for performance reasons). The problem is that when a pipeline doesn't have any artifacts, the dropdown just opens a blank menu with no indication of what should be in there.

We should include a message like No artifacts found or something similar.