Bug 120216 Group dialog should be showed even dataset is not set.
- Add a table report item - do not set the data set - try creating a new table group. - An error is shown Expected behavior - As part of the template requirements, we dont want UI to do the validation. User should be able to go and define a group, even if the dataset is not defined.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* @return true if it included successfully, or false if the operation
	 *         failed.
	 */
	public static boolean includeLibrary( ModuleHandle moduleHandle,
			LibraryHandle libraryHandle ) throws DesignFileException,
			SemanticException
	{
		if ( moduleHandle!=libraryHandle && !moduleHandle.isInclude( libraryHandle ) )
		{
			String defaultName = new File( libraryHandle.getFileName( ) ).getName( )
					.split( File.separator + "." )[0];
			if ( SessionHandleAdapter.getInstance( )
					.getReportDesignHandle( )
					.getLibrary( defaultName ) != null )
			{
				ImportLibraryDialog dialog = new ImportLibraryDialog( defaultName );
				if ( dialog.open( ) == Dialog.OK )
				{
					moduleHandle.includeLibrary( DEUtil.getRelativedPath( moduleHandle.getFileName( ),
							libraryHandle.getFileName( ) ),
							(String) dialog.getResult( ) );
					ExceptionHandler.openMessageBox( MSG_DIALOG_TITLE,
							MessageFormat.format( MSG_DIALOG_MSG, new String[]{
								libraryHandle.getFileName( )
							} ),
							SWT.ICON_INFORMATION );
					return true;
				}
				return false;
			}