When the invoice or po field(s) is left blank, display some default text in the description that is shown in the Stripe dashboard.
When the invoice or po field(s) is left blank, display some default text in the description that is shown in the Stripe dashboard.

coreymgilmore/stripe-appengine-frontend,coreymgilmore/stripe-appengine-frontend,coreymgilmore/stripe-appengine-frontend