Don't defer the disableFormElements call

[antpaw]

https://github.com/rails/jquery-ujs/blob/master/src/rails.js#L482

This line doesn't work for me if the user is offline and I save the data to local storage, it all happens in the same callstack. To defer this call means assuming a xhr call, which is not the case all the time. Maybe rails.disableSelector or e.currentTarget, can be used to retrieve value of a disabled input.