[#3] Elwig: Add feature to sync deliveries

Elwig/Helpers/ExportMode.cs

@@ -1,5 +1,5 @@
 namespace Elwig.Helpers {
     public enum ExportMode {
-        Show, SaveList, SavePdf, Print, Email
+        Show, SaveList, SavePdf, Print, Email, Export, Upload
     }
 }