LP1195150 batch update funds alters debits

When a fund is updated via the ACQ batch update bar (along the top of
the PO interface), ensure that any existing fund debits are updated to
use the new fund.  If the selected fund exceeds the balance block
percent, the operation will fail and the  user will be notified.

Signed-off-by: Bill Erickson <berick@esilibrary.com>
Signed-off-by: Mike Rylander <mrylander@gmail.com>