fix logic to determine if selection changed, update comment to indicate the list does not currently support multiselect

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>
critical fix to shared object reference, child definition needs to be cloned before modifying

Enyo-DCO-1.1-Signed-off-by: Cole Davis <cole.davis@palm.com>