Bug 7133: Late orders don't allow to select more than one order

Bug 7133: Late orders don't allow to select more than one order

To test:

Fix selection of orders from vendors
1) Make sure you have at least 2 late orders each for 2 different vendors
2) Filter list to show only late orders of one vendor
3) Use Check all/Uncheck all
4) Select more than 1 order manually
5) Remove filter on vendor, show all late orders
6) When checking an order from one vendor, checkboxes for other vendors get blocked
7) Check you can select all late orders for one vendor

Display fix: show vendor id in first column instead of ()
1) Veryfy first column of table looks something like: (2) 19/01/2012 (8 days) and has no empty ()

http://bugs.koha-community.org/show_bug.cgi?id=7113
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>