Can't sign transactions for IRIS, NUCLEUSTEST when using Ledger HW via Keplr

[gcharang]

Describe the bug
Can't sign transactions for IRIS, NUCLEUSTEST when using Ledger HW via Keplr. Error on Keplr extension is:

Incompatible Signing Requested
Error: SIGN_MODE_DIRECT can’t be signed on Ledger. Contact the web app provider to fix this issue.

Data when swapping:

{
  "accountNumber": "29",
  "authInfo": {
    "fee": {
      "amount": [
        {
          "amount": "37500",
          "denom": "unucl"
        }
      ],
      "gasLimit": "125000",
      "granter": "",
      "payer": ""
    },
    "signerInfos": [
      {
        "modeInfo": {
          "single": {
            "mode": "SIGN_MODE_DIRECT"
          }
        },
        "publicKey": {
          "typeUrl": "/cosmos.crypto.secp256k1.PubKey",
          "value": "CiEDv442gDF6RuB2tB/lA/yQZTKdgHmJ/vtwthe9LMRBxEM="
        },
        "sequence": "0"
      }
    ]
  },
  "chainId": "nucleus-3",
  "txBody": {
    "extensionOptions": [],
    "memo": "",
    "messages": [
      {
        "typeUrl": "/nucleus.htlc.MsgClaimHTLC",
        "value": "CipudWMxcXpsZjNzNDUzN2hxdHo0NnNrdzB5eTJ2c2Nsa2txZzkzbXQ0cXISQDA3MTEwQjdEOUQ1QjYyQTkxNjJDREU5QThBNzE4RDUxMTNCMzRCNjZDRDk0NjI0N0I1QzQzOTI0NEYzOEQ3NEEaQDFkZWE1YTg4NmQ0Y2E2YjRkYzM0ZjAwY2QyN2UxNDJlODJmYjk0N2U0ODJkOGUxNjdiYTJlMmYyOWEzMzY3ODI="
      }
    ],
    "nonCriticalExtensionOptions": [],
    "timeoutHeight": "6166962"
  }
}

Data when withdrawing:

{
  "accountNumber": "29",
  "authInfo": {
    "fee": {
      "amount": [
        {
          "amount": "45000",
          "denom": "unucl"
        }
      ],
      "gasLimit": "150000",
      "granter": "",
      "payer": ""
    },
    "signerInfos": [
      {
        "modeInfo": {
          "single": {
            "mode": "SIGN_MODE_DIRECT"
          }
        },
        "publicKey": {
          "typeUrl": "/cosmos.crypto.secp256k1.PubKey",
          "value": "CiEDv442gDF6RuB2tB/lA/yQZTKdgHmJ/vtwthe9LMRBxEM="
        },
        "sequence": "0"
      }
    ]
  },
  "chainId": "nucleus-3",
  "txBody": {
    "extensionOptions": [],
    "memo": "",
    "messages": [
      {
        "typeUrl": "/cosmos.bank.v1beta1.MsgSend",
        "value": {
          "amount": [
            {
              "amount": "1000000",
              "denom": "unucl"
            }
          ],
          "fromAddress": "nuc1qzlf3s4537hqtz46skw0yy2vsclkkqg93mt4qr",
          "toAddress": "nuc1qzlf3s4537hqtz46skw0yy2vsclkkqg93mt4qr"
        }
      }
    ],
    "nonCriticalExtensionOptions": [],
    "timeoutHeight": "6181457"
  }
}

[shamardy]

@gcharang this should have been fixed here #2148 , please close the issue if there is nothing else left.