Bug 120503 Cascading Parameter can not drop into layout
Details: Cascading Parameter can not drop into layout Step: 1.Open a report design and Create a Sample Data Source and data set by "select * from CLASSICMODELS.CUSTOMERS" 2.New a cascading parameter and create CUSTOMERSNUMBER and CUSTOMERSNAME in parameter named number and name. Press OK 3.Drop parameter name into layout. Actual results: The parameter in Cascading Parameter Group can not drop to layout
UI/org.eclipse.birt.report.designer.ui.ide/src/org/eclipse/birt/report/designer/ui/ide/wizards/NewReportWizard.java
}
	IPath getDefaultContainerPath( )
	{
		IWorkbenchWindow benchWindow = PlatformUI.getWorkbench( )
				.getActiveWorkbenchWindow( );
		IWorkbenchPart part = benchWindow.getPartService( ).getActivePart( );
		Object selection = null;
		if ( part instanceof IEditorPart )
		{
			selection = ( (IEditorPart) part ).getEditorInput( );
		}
		else
		{
			ISelection sel = benchWindow.getSelectionService( ).getSelection( );
			if ( ( sel != null ) && ( sel instanceof IStructuredSelection ) )
			{
				selection = ( (IStructuredSelection) sel ).getFirstElement( );
			}
		}
		IContainer ct = getDefaultContainer( selection );
		if ( ct == null )
		{
			IEditorPart editor = UIUtil.getActiveEditor( true );
			if ( editor != null )
			{
				ct = getDefaultContainer( editor.getEditorInput( ) );
			}
		}
		if ( ct != null )
		{