app: Always add guest name comment
Even when the user adds comments, we should place the guest's name
unless it is present already.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1623756
Signed-off-by: Victor Toso <victortoso@redhat.com>
Acked-by: Christophe Fergeau <cfergeau@redhat.com>