UI: support multi monitor only for cluster 3.3 and up

When the cluster is less then 3.3 or non Linux OS we set the SinglePCI
checkbox to false and hide it.

Change-Id: I5f65dd3d5ca1409402b9b0b93e1585f4bfa47a64
Bug-Url: https://bugzilla.redhat.com/1009391
Signed-off-by: Shahar Havivi <shavivi@redhat.com>