Show ID for None display name in boot from volume

Fixes bug 1199206.

Change-Id: I5bdbf04d6de1f9d53fa84fad6b7ebae1eb13798a
(cherry picked from commit 52129921003c8da8b46467a6b8d378e60d66ef1d)
Merge "Show ID for None display name in boot from volume" into stable/grizzly