New feature: Arbitrarily change order status with bulk operations

Hello,

I have patched this module so that you can change the status of any order to any available status value using Views Bulk Operations.

Method:
1. Added an element to the array returned by uc_views_bulk_operations_action_info()
2. Implemented new function uc_views_bulk_operations_change_order_status_action() with corresponding X_form() and X_submit() functions.

I did this because the "Move to next state" action, although great, did not offer the flexibility I needed to enable a client to batch update order statuses.

Please find attached the patch used.

Thanks,
Noah Lively