Set invoice line state to paid when invoice is cancelled with cancel move

Such invoice line should be considered as booked for example to compute the
invoiced quantity of stock move.

Closes #13085

modules/account_invoice/invoice.py

@@ -2428,8 +2428,12 @@ class InvoiceLine(sequence_ordered(), ModelSQL, ModelView, TaxableMixin):
     @fields.depends('invoice', '_parent_invoice.state')
     def on_change_with_invoice_state(self, name=None):
         if self.invoice:
-            return self.invoice.state
-        return 'draft'
+            state = self.invoice.state
+            if state == 'cancelled' and self.invoice.cancel_move:
+                state = 'paid'
+        else:
+            state = 'draft'
+        return state
 
     @fields.depends('invoice', '_parent_invoice.party', 'party')
     def on_change_with_party_lang(self, name=None):