propertiesMerger = new PropertiesMerger();
propertiesMerger.setName("panel.propertiesmerger");
propertiesMerger.getModel().addPropertyChangeListener(this);
tabbedPane.add(tr("Properties"), propertiesMerger);
tagMerger = new TagMerger();
tagMerger.setName("panel.tagmerger");
tagMerger.getModel().addPropertyChangeListener(this);
tabbedPane.add(tr("Tags"), tagMerger);
nodeListMerger = new NodeListMerger();