Fix #464: Client-side JSON: option<_> union case argument
Fix #464: Client-side JSON: option<_> union case argument

Tarmil/websharper,Tarmil/websharper,Tarmil/websharper,intellifactory/websharper,intellifactory/websharper,Tarmil/websharper,intellifactory/websharper,intellifactory/websharper