Auto cancel unpaid orders

[AndreiMaz]

Continuation of this work item

Let's allows store owners to automatically cancel unpaid orders (payment status is "pending") after a specified period. A store owner will be able to configure (/Admin/Setting/Order page):

1. Enable/disable this functionality (disabled by default)
2. Choose period of time in minutes (after order placement) when orders should be cancelled (of possible). Default value: 600 minutes
3. Choose payment methods that should be ignored for this functionality (e.g. wire transfer). Default value: empty
4. Checkbox to "put order back as shopping cart". Default value: disabled

Forum source: https://www.nopcommerce.com/en/boards/topic/102988/new-feature-order-not-paid-must-be-possible-to-cancel-by-scheduled-task

[noptools]

4. Choose to "put order back as shopping cart"
   ;)