Ensure the form is validated while creating a kernelspec #61
Description
For now, we hide the standard react-json-form button to only display the JupyterLab buttons
The standard react-json-form button ensures validation, but the JupyterLab buttons does not.
There should be a way to call the validation and not accept the creation if the form is not valid. The validation ways are documented on https://react-jsonschema-form.readthedocs.io/en/latest/usage/validation/
I have quickly tried liveValidate attribute but it does not seem to work.