Re-upload Contacts to Spotler from Same Campaign Activity Merged

A customer would like to be able to re-upload contacts from the same campaign activity. At the moment once you have done the upload from the campaign activity it grey's out the upload button so you can't do this again. It would be useful to be able to do a re-upload and be able to rename the campaign activity in Spotler for the re-upload. The work around at the minute would be to create another campaign activity and copy the contacts the original campaign activity,