Add feature to enter a discontinue reason in order chron to future orders

We would like to be able to track why a pending future order is discontinued in order chron. There is currently no way to do this. It should be similar to how it works when the ancillary department cancels an order - they select a cancellation reason that is table driven. We then want to be able to run a cancelled order report to see what is being cancelled and why. This would allow us to track tests done outside the facility as a reason they are cancelled or staff entry errors vs patient refusals to have the services performed.