Bug 312959 [Import/Export] importing file from big disk hangs UI
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardFileSystemResourceImportPage1.java
private final static String STORE_CREATE_LINKS_IN_WORKSPACE_ID = "WizardFileSystemResourceImportPage1.STORE_CREATE_LINKS_IN_WORKSPACE_ID";
    private final static String STORE_PATH_VARIABLE_SELECTED_ID = "WizardFileSystemResourceImportPage1.STORE_PATH_VARIABLE_SELECTED_ID";
    private final static String STORE_PATH_VARIABLE_NAME_ID = "WizardFileSystemResourceImportPage1.STORE_PATH_VARIABLE_NAME_ID";
    private static final String SELECT_TYPES_TITLE = DataTransferMessages.DataTransfer_selectTypes;
    private static final String SELECT_ALL_TITLE = DataTransferMessages.DataTransfer_selectAll;
    private static final String DESELECT_ALL_TITLE = DataTransferMessages.DataTransfer_deselectAll;
    private static final String SELECT_SOURCE_TITLE = DataTransferMessages.FileImport_selectSourceTitle;
    private static final String SELECT_SOURCE_MESSAGE = DataTransferMessages.FileImport_selectSource;
    protected static final String SOURCE_EMPTY_MESSAGE = DataTransferMessages.FileImport_sourceEmpty;
	private Composite linkedResourceComposite;
	/**
	 * Height of the "advanced" linked resource group. Set when the advanced group is first made
	 * visible.
	 */
	private int linkedResourceGroupHeight= -1;
	private Composite linkedResourceParent;
    /**
     *	Creates an instance of this class
     */
    protected WizardFileSystemResourceImportPage1(String name,
            IWorkbench aWorkbench, IStructuredSelection selection) {
        super(name, selection);
    }
    /**
     *	Creates an instance of this class
     *
     * @param aWorkbench IWorkbench
     * @param selection IStructuredSelection
     */
    public WizardFileSystemResourceImportPage1(IWorkbench aWorkbench,