Show sender name if set for Voicemail.
Show sender name if set for Voicemail.

Fixes: NB#152783 - Voicemail notification doesn't show sender name

community-ssu/hildon-home,Cordia/hildon-home,community-ssu/hildon-home,Cordia/hildon-home,Cordia/hildon-home,community-ssu/hildon-home