Admin interface for a file field

[Shelob9]

This is the configuration UI for 1 file field.

MUST have same settings as existing file fields.
https://calderaforms.com/doc/advanced-file-field/

Should be constructed using one RenderGroup component.

• https://calderalabs.org/caldera-components/manual/components.html
• https://calderalabs.org/caldera-components/class/src/components/RenderGroup.js~RenderGroup.html

State management is NOT in scope. This component, should accept everything it needs, including change handlers as props, defined using prop-types. https://www.npmjs.com/package/prop-types

Processor UI is a good reference, but this is not a processor, so its UI goes here.