Fixed the URL of the 3351 brought-forward subject in the balance sheet to the income statement before the current period in the accounting application.

accounting/templates/accounting/balance-sheet.html

@@ -293,7 +293,6 @@ First written: 2020/7/20
           </li>
           {% for item in group.details %}
             <li class="list-group-item d-flex justify-content-between align-items-center account">
-              {# TODO: Link to the income statement for account #3351 #}
               <a class="list-group-item-action" href="{{ item.url }}">
                 {{ item.title|title }}
                 <div class="float-right">