(Fix) Remove the provider when the site is disconnected

[fernandomg]

When a user disconnected the Safe from the wallet, the Safe didn't remove the provider leading to the error: Provided address "" is invalid, the capitalization checksum test failed, or it's an indirect IBAN address which can't be converted.

This PR solves that issue by disconnecting the provider when there's no address provided by the connected wallet.

[github-actions]

CLA Assistant Lite All Contributors have signed the CLA.

[github-actions]

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Type	Occurrences	Fixable
Errors	0	0
Warnings	1	0
Ignored	0	N/A

• Result: ✅ success

• Annotations: 1 total

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[warning] @typescript-eslint/explicit-module-boundary-types

Require explicit return and argument types on exported functions' and classes' public class methods

• src/components/ConnectButton/index.tsx Line 68 - Argument 'props' should be typed.

---

^{Report generated by eslint-plus-action}

[ghost]

Travis automatic deployment:
https://pr1585--safereact.review.gnosisdev.com/volta/app

[ghost]

Travis automatic deployment:
https://pr1585--safereact.review.gnosisdev.com/rinkeby/app

[dasanra]

@fernandomg Nice catch. I found one scenario where this still happen. It's not that critical because it's only once. If you Lock Metamask the Safe Multisig disconnects, but then you unlock Metamask again (without clicking anything in the Safe) and you get the samer error

[ghost]

Travis automatic deployment:
https://pr1585--safereact.review.gnosisdev.com/rinkeby/app

[ghost]

Travis automatic deployment:
https://pr1585--safereact.review.gnosisdev.com/volta/app

[ghost]

Travis automatic deployment:
https://pr1585--safereact.review.gnosisdev.com/volta/app

[ghost]

Travis automatic deployment:
https://pr1585--safereact.review.gnosisdev.com/rinkeby/app

[fernandomg]

I found one scenario where this still happen. It's not that critical because it's only once. If you Lock Metamask the Safe Multisig disconnects, but then you unlock Metamask again (without clicking anything in the Safe) and you get the samer error

@dasanra, just created #1589, to keep track of this finding and a possible refactor of the connection management in the Safe.

[ghost]

Travis automatic deployment:
https://pr1585--safereact.review.gnosisdev.com/volta/app

[ghost]

Travis automatic deployment:
https://pr1585--safereact.review.gnosisdev.com/rinkeby/app

[francovenica]

Never thought about this one.

Tried disconnecting from the MM prompt the connection to gnosis
If there are more than 1 MM address from the same wallet connected to gnosis, when you disconnect one it will jump to the next. When the last one is disconnected gnosis will cut the connection with MM completely
If you use the "Disconnect all accounts" from the MM prompt the same will happen, gnosis will cut connection with MM completely.

I had no problems reconnecting to the site after all this.

Looks good to me