Commit selected element along with the index on change event

[DZunke]

Summary

I have build a small external listener to chosen that builds some custom "null" Elements for selection complete optgroups with a single click. These "All of "-Elements have a simple null value and nothing more then the name to get them. The Index of Chosen is the thing that had not helped me to get the selected element in the origin select box (the hidden form element).

So i added selected_element along with selected and deselected_element along with deselected. These are additional information that will be send along with the change event to the hidden select element.

I have not added the fields to code parts that does not have the selected or deselected fields.