[harmony-demo-1] JComboBox.testGetSetEditor() fixed

[Mackie Mathew]

The above test was fixed with the following modification in BasicComboBoxUI:

protected void unconfigureEditor() {
        editor.removeFocusListener(editorFocusListener);
        if (comboBox.getEditor() != null) {
            comboBox.getEditor().removeActionListener(editorActionListener);
        }
        editorFocusListener = null;
    }

Regards,

Tharindu