[Feature Request / Idea] Ability to create Shipping / Postage label from invoice / client

I'm not sure how many more would find this useful, but some way to quickly make and print a shipping / postage label for print straight from Invoice Ninja would be helpful.

A one click button under the clients details and available while making invoices would be nice, if you can theme the print design similar to how email templates are themed including adding company name and logo.