Bug 178297 [Dialogs] - remove required field color
There are still some dialogs using the (now deprecated) class FieldAssistColors. We shouldn't color the required fields anymore in these dialogs: NewFolderDialog CreateLinkedResourceGroup ResourceWorkingSetPage ContainerSelectionGroup ResourceAndContainerGroup
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/CreateLinkedResourceGroup.java
return createStatus(
					IStatus.ERROR,
					IDEWorkbenchMessages.CreateLinkedResourceGroup_linkTargetNotFile);
		} else if (type == IResource.FOLDER && !linkTargetFile.isDirectory()) {
			return createStatus(
					IStatus.ERROR,
					IDEWorkbenchMessages.CreateLinkedResourceGroup_linkTargetNotFolder);
		}
		return Status.OK_STATUS;
	}
	/**
	 * Validates this page's controls.
	 * 
	 * @param linkHandle
	 *            The target to check
	 * 
	 * @return IStatus indicating the validation result. IStatus.OK if the
	 *         specified link target is valid given the linkHandle.
	 */
	public IStatus validateLinkLocation(IResource linkHandle) {
		if (linkTargetField == null || linkTargetField.isDisposed()
				|| !createLink) {
			return Status.OK_STATUS;
		}
		IWorkspace workspace = IDEWorkbenchPlugin.getPluginWorkspace();
		FileSystemConfiguration configuration = getSelectedConfiguration();
		if (configuration == null
				|| EFS.SCHEME_FILE.equals(configuration.getScheme())) {
			
			IPath location = new Path(linkTarget);