Progressively load contract info on confirm screen

[danjm]

We currently make the user wait until all contract info is loaded before rendering the confirm screen for contract methods. #6380 will allow us to have the info we need to render the confirm screen without waiting for network requests.

We now need to change the way we fetch extra info, such as the contract name, so that it is non-blocking. We also need to make UI additions that show this extra info in some sort of loading state until it is available.