Fix translation done twice into field title of array

htdocs/accountancy/admin/productaccount.php

htdocs/accountancy/bookkeeping/balance.php

htdocs/accountancy/bookkeeping/card.php

htdocs/accountancy/bookkeeping/list.php

htdocs/accountancy/bookkeeping/listbyaccount.php

htdocs/accountancy/bookkeeping/listbyyear.php

htdocs/accountancy/bookkeeping/thirdparty_lettrage.php

.../accountancy/bookkeeping/thirdparty_lettrage_supplier.php

htdocs/accountancy/customer/lines.php

htdocs/accountancy/customer/list.php

htdocs/accountancy/expensereport/lines.php

htdocs/accountancy/expensereport/list.php

htdocs/accountancy/supplier/lines.php

htdocs/accountancy/supplier/list.php

htdocs/adherents/list.php

htdocs/adherents/subscription/list.php

htdocs/adherents/type.php

htdocs/admin/defaultvalues.php

htdocs/admin/tools/listevents.php

htdocs/admin/tools/listsessions.php