[feature] Have easily multiple native wallets on the same machine

[barbierir]

Option on startup in full mode, to load up a wallet.dat file from a different folder. Or alternatively to have multiple wallet.dat files with custom names in the same folder (wallet1.dat, walletZ.dat etc.)

This can be done manually, changing names and moving the files around but it's very easy to mess it up

[pbca26]

i will look into this