Report of existing scheduled backup files disappears after form submission

== Steps to reproduce ==

1. Setup scheduled backups. Wait until at least a scheduled backup has been made.
2. Go to Administration > Backup
3. Crowd correctly reports that there are some backup files, between date X and date Y
4. Submit the first form (the Scheduled Backup form).

== Expected outcome ==

The report is visible after submitting the form.

== Actual outcome ==

The report disappears from the screen after submitting the form.