Add a way to connect an existing invoice to an existing order made by admin
Now when an admin create a new order - he can choose if he want to generate an invoice for that order.
If we does so there is a connection between the order and the invoice - so the admin can see the invoice that was generated by this order and even click on the invoice number to directly get to the relevant invoice (see Capture.PNG).
But if when the admin create the new order he select not to generate an invoice - there is no way to connect an invoice to this order no more (see Capture1.PNG).
We need a way to add / connect an existing invoice to an existing order that was made by admin - so there will be a clear connection between an order to an invoice.