Bug 21346: Remove double dialog

Bug 21346: Remove double dialog

To Test:
1) Place a hold on an item for pickup at another branch.
2) Check in item to trigger hold and transfer.
3) Check in item again without changing location.  Note modal AND old
dialog behind modal.
4) Apply patch.
5) Check in item again without changing location.  Note modal without
the old dialog.

Signed-off-by: Lisette <lisetteslatah@gmail.com>
Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 230905e1d56a11cf5619f95c95920eb09803900c)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>