[sigg]

I don't know how other addons provide the Wheel feature but something I am sure, it is not standard.

From the file SecureTemplates.xml :

 <!-- A variant of SecureActionButtonTemplate used for unit buttons -->
    <Button name="SecureUnitButtonTemplate" inherits="SecureFrameTemplate" virtual="true">
        <Scripts>
            <OnClick function="SecureUnitButton_OnClick"/>
        </Scripts>
    </Button>

There is no OnMouseWheel script.

Sorry, I have fixed a issue with button click 10 to 15 in github.