Show filters or filtered column in UI mode so user can be sure that filter applied

[fedordikarev]

Based on discussion in Slack:
when user runs unused in UI mode and uses filters, it's unclear and scary to delete all the disks listed.
We may either show all the filters applied (and for example, show count: filtered xxx disks out of yyy) or show the field and value in the list, so user will see that filter applied.