Allow editing json (or multi line) query parameters

[xPaw]

I am using some APIs that put json requests in the query parameter and it works but the experience is a bit subpar in Thunder because it's the input is not multiline so for longer jsons it requires scrolling around.

I'm thinking even for non json fields that have long values a multi line input could be beneficial.

If the input is marked as JSON, then it could be validated and sent without whitespace.

[rangav]

Thanks @xPaw for the feedback, Will review it.