WebApp - Add message when perform connect and sign transaction with Moonbeam on Polkadot vault

Describe the task Block attach account Polkadot vault for network Moonbeam, Moonriver, Moonbase (Polkadot vault does not support Moonbeam, Moonbase, Moonriver)

Actual: Still allow attach account but can not sign transactions cause Polkadot Vault do not support Expect:

In case attach account: Show message: "Invalid QR code. EVM networks are not supported"
In case attached account: When perform any transaction then show warning message do not supported : "This feature is not available for EVM QR signer account. Change to another account type and try again."

Koniverse / SubWallet-Extension

WebApp - Add message when perform connect and sign transaction with Moonbeam on Polkadot vault #3077