Fix: no empty string into node object

[Tuditi]

Summary

Fixes sending empty strings as properties for the node object. This results in 400 errors.
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Changelog

- Build node object within NodeConfigurationForm
- Use enums instead of strings for TextType

Testing

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[MarkNerdi996]

Works good!
just a few coding convention reminders

[nicole-obrien]

LGTM!

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