Watching for changes on `atList` in paginated_setup

**Scenario**

I ran into a problem where I would initially have 2 results. When I changed a filter, a new AJAX request was fired, different data was returned, but the table wouldn't update as it also contained 2 results. It would only update once the length of the atList array changed.

I removed the `at-paginated` attribute on the table and it would work fine, hence the change below.