How to select "ISO A" (auto) using Custom Controls with lever assigned to ISO change?

Question

On 7D Mark II with firmware 1.0.4, I have used Custom Controls to assign ISO change to the lever.  However, it is not possible to change ISO to "ISO A" (auto).  How to select "ISO A" (auto) using Custom Controls with lever assigned to ISO change? 

Answer 1

Follow Up:
Ok so ive changed things up a bit and have had some more success.
I have used a Switch statement in my For loop to perform different actions based on the item selected.
The code looks like this:
Workbook.Content.Table1.Row3.AppropriationDetails.Row4.Cell1::change - (JavaScript, client)
var fFrom = xfa.resolveNodes("Workbook.Content.Table1.Row3.AppropriationDetails[*] .Row4.Cell1");
var fTo = xfa.resolveNodes("Workbook.Content.Table2.Row3.AppropriationDetails[* ].Row4.Cell1");
for (var i=0; i <= fFrom.length-1; i++) {
     switch (fFrom.item(i).rawValue)
     case "Option 3":
     fTo.item(i).rawValue = "Enter the details in the field below";
     break;
     default:
     fTo.item(i).rawValue = fFrom.item(i).boundItem(xfa.event.newText);
     break;
This code solves my problem but has thrown up a new issue:
When i select Option 1 or 2 from the dropdown list  the change in the text field is instantaneous, however if I select Option 3 it wont appear in the text field until I either select Option 3 a second time or select another item. Its as if the text field is a selction behind what I have enterd in the dropdown list.
Any thoughts?