A transaction with no `to` showed a blank recipient line on the wait,
success and error screens and the transaction detail view: an empty
address, with a colour dot whose colour was `undefined`. The approval
screen showed "(contract creation)".
All five now say "This transaction creates a new contract. It has no
recipient." A transaction with a real `to` is unchanged. The new test
drives each screen both ways.
Model: opus-5-5
