Improve setup experience when user connects a Safe

[apbendi]

As reported by a user:

I just connected with a smart contract wallet (Safe). I understand that "receive" and "setup" does not work because I need an EOA to sign.

This is likely correct—user's probably can't go through the setup process with a contract wallet like Safe—but we likely don't provide a good error message or explanation for them as to why. We should test this out to see what the experience is currently like and make improvements to it as warranted.