`JsonInput` should auto-format the first time it renders data

[haynesjm42]

Or we should at least provide an option to do this automatically. Usually don't want unformatted json in the input when viewing or editing.

[RyanMG]

I looked this over today. I could not reproduce the issue, unless I am misunderstanding what is happening / being reported. I found a use of jsonInput in toolbox, and it looks like its providing mode: 'application/json', to the codeInput component. It in turn seems be using codemirror, which would use this mode value to know it should be formatting / displaying the data in a pretty-printed JSON format. (https://codemirror.net/5/mode/ as per the hoist-react code).

When stepping through the code I see an unformatted JSON string passed into jsonInput, and pretty print JSON displayed. (I was using this in testing ) As far as I can tell, codemirror is doing its magic under the hood to get us here, and that is happening automatically without us needed to provide additional formatting. Meaning, it does not seem like we DO need to do manual formatting of the data going into the component, as was done in https://github.com/xh/hoist-react/pull/1921/files/6e188fb6b3ebc328b71a2d76d7835e34a95f4383#diff-375f264dea21884542755f0035f4cb0384111fd094698dcbde1806960198a4aeR57

Please let me know if I am missing something, or misunderstanding the request.