Create / Add line purchase order from a Part page.

[SchrodingersGat]

          Create / Add line purchase order from a Part page.

Use case:

• User are in the stock and realize Part X is running low.
• Scan the QR on the part box
• App opens the part page
• Select the option "Order Part" from the part page.
• Input a quantity and other potential things needed.

This either generate a new PO or add a line to an existing PO, or perhaps a virtual PO.. ?

Originally posted by @damien-ls in #310 (comment)