Disallow manually deleting orders

[lamontfr]

Expected Behaviour

• In the Orders list, I should not be able to delete an order but I should be able to cancel it.
• If I ever need to delete an order, I can use the Admin to do so.

  Actual Behaviour

• In the Orders list, I can delete an order (rightmost trashcan icon) which is dangerous because the next nightly automatic order generation will recreate it.

  Proposed solution

• In the Orders list page remove the trashcan icon and add the cancel icon (just like in the Kitchen count Review orders list).