Picker widget doesn't reset its value after closing

[Eleanor Berger]

After making a choice and closing a picker widget, opening it up again reveals the text previously entered in the search input box. Instead, it should be empty.

[Guilherme Salgado (salgado)]

By default the picker will clear itself when you dismiss it with the 'save' event (i.e. click on an item from the list of results), but it won't do that when you close the picker. That's just the default behaviour, which can be changed by passing clear_on_cancel=true when creating the picker.