Hassio: Add confirmation and file management (delete) to Snapshots

Please consider adding some basic confirmation step before restoring a Snapshot.
As it is, clicking the restore button immediately starts the restoring process. Which, if one clicked it by accident (as i have been forced to experience …) isn’t very desirable and causes enormous effort to get back again.

A simple ‘Are you sure?’ button would suffice. Just as the basic command shell does, when issuing system commands. Restoring a backup is one of these for sure.

As an extra feature enhancement on the Snapshot page, it would be very welcome to be able to delete older snapshots, that only take space on the flashcard (Pi3 talking here). Deleting these snapshots from the backup folder isnt reflected in the Hassio interface.