bug: Users cannot switch wallets without manually clearing local storage

[davidlaprade]

Once you've connected to the app with a wallet, we remember your wallet app choice via a local storage variable. Then, whenever you return, we immediately attempt to reconnect with that wallet app. If you refuse to connect b/c you want to use another app, you just get this error:

The error is fine, but doesn't provide an option to change wallets. We should add a button that clears the local storage var and pops open the wallet select modal:

[mds1]

I think we should update the address/avatar so that when clicked it shows something similar to what Uniswap does as shown below. All those features lgtm (except we don't need transaction history)

[alexkeating]

Once #395 Is merged I can pick this up and replace the the connect button with Onboards account center