Added filter to exclude powered off VMs.  Added columns Cluster and Folder, sorted.

Added filter to exclude powered off VMs.  Because powered off VMs aren't running the VMtools to get the guest host name it report as null and then potentially a false positive for a name mismatch.

Added the columns Cluster and Folder, and sorted by folder and VM name, to make it easier to find a problem VM and decide if there is an urgent problem.  For instance, I'm not gong to worry about a misnamed VM in the folder "testingstuff".