added showing fibu-acc-nr in invoice

Layout/default/Invoice/Index.php

@@ -299,6 +299,7 @@ $pagination_entity_name = "Rechnungen";
                                 <tr>
                                     <th>Rechungsnummer</th>
                                     <th>Rechnungsdatum</th>
+                                    <th>FIBU Konten</th>
                                     <th>Kundennummer</th>
                                     <th>Rechnungsadresse</th>
                                     <th>Netto</th>
@@ -322,6 +323,7 @@ $pagination_entity_name = "Rechnungen";
                                             <?php endif; ?>
                                         </td>
                                         <td><?=date("d.m.Y", $invoice->invoice_date)?></td>
+                                        <td><?=$invoice->fibu_account_number?></td>
                                         <td><?=$invoice->customer_number?></td>
                                         <td>
                                             <?=($invoice->company) ? $invoice->company."<br />" : ""?>