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
|| (sourceParentStore != null && destinationStore
								.equals(sourceParentStore))) {
					return NLS
							.bind(
									IDEWorkbenchMessages.CopyFilesAndFoldersOperation_importSameSourceAndDest,
									sourceStore.getName());
				}
				
				
				IFileStore destinationParent = destinationStore.getParent();
				if (sourceStore.isParentOf(destinationParent)) {
					return IDEWorkbenchMessages.CopyFilesAndFoldersOperation_destinationDescendentError;
				}
				}
			}
		}
		return null;
	}
	/**
	 * Check if the destination is valid for the given source resource.
	 * 
	 * @param destination
	 *            destination container of the operation
	 * @param source
	 *            source resource
	 * @return String error message or null if the destination is valid
	 */
	private String validateLinkedResource(IContainer destination,
			IResource source) {
		if ((source.isLinked() == false) || source.isVirtual()) {