Add abi.ninja style ablity to handle tuples

[escottalexander]

Currently when you click "manually add transaction" and the custom tab then you have to input the functions signature

Abi.ninja can handle tuples while HWR can not. This issue is for making HWR more robust so that it can handle tuples.

For an example load this contract in https;//abi.ninja: 0xC059A531B4234D05E9ef4ac51028F7E6156E2CCe

With this abi:

[
 {
    "inputs": [
      { "internalType": "uint256", "name": "amount", "type": "uint256" },
      {
        "components": [
          { "internalType": "uint256", "name": "rewardId", "type": "uint256" },
          { "internalType": "uint256", "name": "amount", "type": "uint256" },
          { "internalType": "bytes32[]", "name": "proof", "type": "bytes32[]" }
        ],
        "internalType": "struct IMemecoinStaking.Reward[]",
        "name": "rewards",
        "type": "tuple[]"
      }
    ],
    "name": "unstake",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  }
]