Here's a quick video of restoring a deleted order (just below it is a step by step).

To restore any deleted orders, just go over to your Deleted orders screen from the side-menu.

Then hover over the order you'd like to restore to display the Restore order icon.

Click on it, confirm, and ta-da, your order is back in the Verify screen!

Pro-tip: You can select a few deleted orders and restore them all at once.

That's it!