Allow users to to restore supplies by either deleting the record or deleting the requistion history.

Models/Supply/SupplyUsageHistory.cs

@@ -1,6 +1,7 @@
 namespace CarCareTracker.Models
 {
     public class SupplyUsageHistory {
+        public int Id { get; set; }
         public DateTime Date { get; set; }
         public string PartNumber { get; set; }
         public string Description { get; set; }