Make viewing forms in storybook more robust

[blcham]

Motivation here is to be able to process any JSON-LD with correct data to form (i.e. make it robust for any s-forms apps as well).

Test case 1:

• it should be possible to make transformation with some tool as follows form1.json --> form1.ttl --> form1.json. Let's test it on rdfpipe command line tool, i.e. using command rdfpipe -i json-ld -o json-ld form1.json > tmp.json; cp tmp.json form1.json

A/C:

• storybook shows the form properly after using rdfpipe command above

[blcham]

@palagdan we should talk about how it works now to save u time understanding the code