virsh.list: When setting title, add proper option to virsh.desc

Commit id '58fd81a8' added the --title testing for virsh.list; however,
the add of the title was done to the --config and for a running domain
that didn't have expected results. Adjust the add of the title to be
based on the expected state of the domain.

Signed-off-by: John Ferlan <jferlan@redhat.com>
Merge pull request #106 from jferlan/list

virsh.list: When setting title, add proper option to virsh.desc