action - update

[marcin-filipiak]

New functionality that updates the content of a fields in a form.
In this example JSON has "action" : "update" and send new "value" for "label" with name "temperature" in form "test_form".

{ "action" : "update", "forms": [ { "name": "test_form", "members": [ { "type": "label", "name": "temperature", "value": "28*C" } ] } ] }