Single Select Old Value is always null when change listener is called

[howudodat]

select.addChangeListener((o,n) ...
if it is a multi select o is an array[] as is n.
if it is a single select o is always null even if something was selected

Select#onOptionDeselected (line 130) gets called prior to withOption (line108) so that when getValue() is called to get the old value, it returns null

To Reproduce
Run the demo app, use Single Select, select a value, Old Value = null. Select another value, Old Value = null;

Expected behavior
When a previous value was selected the change should pass in the old value