layout.verticalSpacing = 9;
final Label label1 = new Label(container, SWT.NULL);
label1.setText(Messages.NewFolderWizardPage_ParentLabel);
_tree = new TreeViewer(container, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
_tree.setContentProvider(new FolderContentProvider());
_tree.setLabelProvider(new ScannedMapsLabelProvider());
_tree.setUseHashlookup(true);
_tree.setInput(CalibratorPlugin.getModel().getTreeRoot());
_tree.addSelectionChangedListener(new ISelectionChangedListener() {
@Override