To improve readability.

Disconnect connector on close modal button when the message is not
signed. The user can connect sucessfuly with wallet but also can reject
the sign message step. If the user rejects the login message signing and
closes the modal, they should get back to the initial state of the not
connected account.

The wagmi returns the connector object even if we call `disconnect`
function. In that case the connector has basic information like: id,
name, type and uuid and the status is set to `connected`. So here we
need to make sure the `getAccounts` and `getBitcoinAddress` functions
exist in the connector object.

…rors