Remove BackPrompt

- unset modfunc only if error
Remove BackPrompt in AddressFields.php
Remove BackPrompt in AssignOtherInfo.php
Remove BackPrompt in Address.inc.php
Remove BackPrompt in PeopleFields.php
Remove BackPrompt in StudentFields.php
Remove BackPrompt in MassAssignFees.php
Remove BackPrompt in MassAssignPayments.php
Remove BackPrompt in UserFields.php
Fix note display via ErrorMessage
Minor changes
SQL fix duplicate entry in profile_exceptions