Bug 15951: Use Font Awesome icons for acquisitions order cancellation confirmation

 Bug 15951: Use Font Awesome icons for acquisitions order cancellation confirmation

In Acquisitions, when you delete (cancel) an order, a dialog asks you to
confirm. This dialog should be styled with Font Awesome icons.

Other minor edit: Changing page grid style for centered main content
area.

To test, apply the patch and locate a basket in Acquisitions with an
order.

- View the details for the basket.
- Click the 'Delete' link next to the order you want to delete.
- Confirm that the dialog is correctly styled.
- Test the cancel operation and verify that you are correctly redirected
  back to where you were.
- Test the confirmation operation and verify that your order is deleted.
- Also test the deletion process from Acquisitions -> Vendor -> Invoices
-> Invoice -> Go to receipt page -> Delete order.

Signed-off-by: Hector Castro <hector.hecaxmmx@gmail.com>
Works as advertised

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>