[+] Updated @multiversx/sdk-dapp to 2.18.3

[radumojic]

[+] updated branding: xPortal instead of Maiar, use https://tools.multiversx.com [+] updated config to avoid error logs generated by @walletconnect ( see more: https://github.com/WalletConnect/walletconnect-monorepo/issues/1908 )