Only call handle donor change methods if needed within reset
Only call handle donor change methods if needed within reset

If either of the account1imported or contact1imported fields are
null or undefined when reset is called, then they shouldnt need
to be reset to null again.

SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus