If anyone else stumbles upon this topic, a quick and dirty way to clear the value contained in the widget is in emptying the two inputs that are inside the combobox widget.
Something like:
$('#widget-id').down('input').val(null);
This can be triggered with the change event: if you focus out from the combobox, the change will fire, but with an empty event.args value. If there is no event.args, we can trigger the “manual” cleanup.
Hack-ish, but seems to work in my use cases.
Best,
Alberto Chiesa
