Compare Proof button- compare >2 proofs at a time

[#1]

DSG would love the ability to compare more than 2 proofs at a time. The current functionality provides the 'compare proof' button when clicking multiple proofs in the 'documents' tab, but we would like to be able to compare more than 2 at a time. When you click >2 at this time, it unselects the compare button with 2 being the max. This will help with the large scale of versioning that happens in retail.