ListBox [feature] - should report what kind of event was trigger the onChange event

At this moment it's not possible to know what event made the onChange event been triggered, there are legit cases where you want to know if the `onChange` was triggered by an `onClick` or `onKeyDonw`, the Listbox already provided an `event` type passed by the third argument not he onChange callback, but doesn't describe which kind of type created it.

We should modify those string to reflect this change.