Bug 16253: Changing 'delete order' to 'cancel order'

Bug 16253: Changing 'delete order' to 'cancel order'

To test:
1) Go to Acqui -> do a vendor search and view an open basket
2) Confirm last column heading says cancel instead of delete
3) Confirm link to cancel order says cancel instead of delete
4) If can't delete record, confirm reasons say cancel order instead of delete
5) Click the vendor name, then Baskets tab, then Receive Shipment
6) Fill vendor invoice field and click next
7) If there are any pending orders, confirm that all instances of 'delete order' now say cancel

Sponsored-by: Catalyst IT
Signed-off-by: Mirko Tietgen <mirko@abunchofthings.net>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>