Bug 310494 [LinkedResources] Preference "Link and create virtual folders" does not work
I20100425-2000 The 2 options on the Linked Resourced with name "Link and create virtual folders" don't work. When they are selected, dropping items does nothing. In CopyFilesAndFoldersOperation#copyOrLinkFiles(..), the test "hasFlag(dropOperation, ImportTypeDialog.IMPORT_VIRTUAL_FOLDERS_AND_LINKS)" always fails because dropOperation is always COPY.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/CopyFilesAndFoldersOperation.java
* @see Display#getThread()
	 * @see Thread#currentThread()
	 * @since 3.2
	 */
	public void copyFiles(URI[] uris, IContainer destination) {
		IFileStore[] stores = buildFileStores(uris);
		if (stores == null) {
			return;
		}
		copyFileStores(destination, stores, true, null);
	}
	/**
	 * Copies the given files and folders to the destination without forking a
	 * new Thread or blocking using a WorkspaceModifyOperation. It is
	 * recommended that this method only be called from a {@link WorkspaceJob}
	 * to avoid possible deadlock.
	 * 
	 * @param uris
	 *            the URIs to copy
	 * @param destination
	 *            destination to which URIS will be copied
	 * @param monitor
	 *            the monitor that information will be sent to.
	 * @see WorkspaceModifyOperation
	 * @see WorkspaceJob
	 * @since 3.2
	 */
	public void copyFilesInCurrentThread(URI[] uris, IContainer destination,
			IProgressMonitor monitor) {
		IFileStore[] stores = buildFileStores(uris);