"Edit json" button does not work if form contains checkboxes

[seanmaher]

You get an error when you press "Edit json" if form contains checkboxes.
The error is because checkboxes use this.inputs, not this.input (Around line 5094).

Link to example schema:
http://jeremydorn.com/json-editor/?schema=N4IgLgngDgpiBcID2AjAVjAxmEAaEUATkrIWAJYwDOCoANjAIYAmMhAwnY1VQEowBHWiACuAO3ICRMAJJgYAWxrwwhafkiwEIRoUKMIeAsVKQA8oVaEEAZgAM+cvKXCYYkQoQBtEO0ZQwRnIxIwAFcjokHHwAZQURAHMEhmt8dnIANwjyRhCAXQ1oOEQqVWCEkABfasqgAA=&value=N4IgNgpghgJhBOBhMUDOqBKECOIBcA2gLoC+QA==&theme=bootstrap2&iconlib=fontawesome4