Enable shell to resize and restart

By prepending "do_" to corresponding functions.

Change-Id: I1a22527ab36b636eb3e6364e669a3d64154beca5
Correct handling args.backup in do_create

We have to use args.backup, not self.backup.

Change-Id: I1f3c892cd4e9c1a42586bdd34d5239cb90c9af74
Fixed bug with showing backups

Pass on cs to _find_backup and use correct return variable.

Change-Id: I042d161295e4e219749ebc7dd724cd8bc6ef4d10
Merge "Correct handling args.backup in do_create"
Merge "Fixed bug with showing backups"