Allow contacts to be searched by donation field/fund so that search may be saved in order to email donors on the status of the campaign.

Right now, the solution is to export the list, create a field in WA, add that field to the downloaded spreadsheet and populate it, upload the data, run the search, save it, then send the email. Each subsequent donor has to be added manually by populating that field in their profile or, if there are several, performing the entire download/upload/search process again.