Importing Invoice to Credit note warning

When importing an invoice to a credit note and the invoice been imported has a credit note allocated to it. 

 There is a warning to indicate that the credit note was done for this invoice. 

 This warning only works if: 

 

 When using the Import From Invoice button 

 The invoice import has a credit note allocated to it 

 

 

 When importing, a warning to alert you that a credit note was done against the invoice you are importing