Do not show unsupported fields in Exposed Object

[husberg-disguise]

Reported internally (DSOF-17009) by @bbuckley94:
Currently, when you add an Exposed Object to a Remote Parameters component, all parameters for the exposed object component are added as fields. There are many types that are unsupported by d3 and RenderStream and therefore are not written to the JSON file even if they are enabled. It would be nice if we could add a whitelist of supported types so that when we add an exposed object component only those that are supported appear within the 'Fields' list.
Having less options always makes things less complicated for the end-user and avoids any potential confusion.