Generic API Error Handling

[Tanz0rz]

We can return them in the collapsed view too if that is better. Right now, the new lines and whitespace are formatted in. Here is an example using the swap example file:

Failed to get swap data: processing response failed: {
    "description": "Not enough 0x853d955acef822db058eb8505911ed77f175b99e balance. Amount: 1000000000000000000. Balance: 0",
    "error": "Bad Request",
    "meta": [
        {
            "type": "fromTokenAddress",
            "value": "0x853d955acef822db058eb8505911ed77f175b99e"
        },
        {
            "type": "amount",
            "value": "1000000000000000000"
        },
        {
            "type": "fromTokenBalance",
            "value": "0"
        }
    ],
    "requestId": "8b78c4b7-e9e1-46e2-84fa-457c26c1c275",
    "statusCode": 400
}

[EnoRage]

@Tanz0rz can you fix the unit tests?

[EnoRage]

LGTM, let's fix the tests and merge