Review UX for Deletion of Record (#447)

When a record is deleted, the user is notified (by toast). However, the user remains in the record view and the deleted record is displayed.

Recommend that on deletion:
* the user is notified that the record has been deleted (or not); and
* if the record has been deleted, the user is redirected to the datasets list view.

Start by locating the record view's deletion flow and the existing toast handling in this Vue application. Verify how successful and failed deletions are reported, then confirm that a successful deletion redirects to the datasets list while a failed deletion leaves the record view available.

Written by the indexing model from the issue text.