changed dictionary to class object so we can enforce field requirement.

Models/GenericRecord.cs

@@ -11,6 +11,6 @@
         public string Notes { get; set; }
         public List<UploadedFiles> Files { get; set; } = new List<UploadedFiles>();
         public List<string> Tags { get; set;} = new List<string>();
-        public Dictionary<string, string> ExtraFields { get; set; } = new Dictionary<string, string>();
+        public List<ExtraField> ExtraFields { get; set; } = new List<ExtraField>();
     }
 }