gridBagConstraints.insets = new Insets(2, 10, 20, 10);
attributeNames = new JComboBox();
final MapModel map = Controller.getCurrentController().getMap();
final AttributeRegistry attributes = AttributeRegistry.getRegistry(map);
final ComboBoxModel names = attributes.getComboBoxModel();
attributeNames.setModel(new ClonedComboBoxModel(names));
attributeNames.setEditable(true);
attributeNames.setMaximumSize(comboBoxMaximumSize);
attributeNames.setPreferredSize(comboBoxMaximumSize);
attributeNames.addItemListener(new ItemListener() {
public void itemStateChanged(final ItemEvent e) {