Support multiple orders on "Radiology Orders" tab

[jmandel]

After we've covered the essentials... can go back and support entering multiple orders into the Scratchpad, rather than just one.

• Add an "Add Draft Order" button to the order entry form
• Add a list of draft orders below the order entry form
• Include a PAMA Appropriateness badge for each draft order
• Include a "X" (to delete) for each draft order
• Include all draft orders in the outbound orderSelect CDS Hook payload