Bug 154832 Wrong node is added to Report Parameters for cascading parameter in Palette view
Description: Wrong node is added to Report Parameters for cascading parameter in Palette view. Steps to reproduce: 1. New a report, add a cascading parameter 2. Switch to Script tab in Editor view, and then switch to Palette view 3. Expand Report Parameters node Expected result: A cascading parameter group is added to Report Parameters node Actual result: Expect a cascading parameter group is added to Report Parameters node, the children of the cascading parameter group are added as scalar parameters
UI/org.eclipse.birt.report.designer.ui.editors.schematic/src/org/eclipse/birt/report/designer/internal/ui/editors/script/JSEditor.java
if ( desHdl != null && getEditorText( ) != null )
		{
			try
			{
				if ( desHdl instanceof ExtendedItemHandle )
				{
					( (ExtendedItemHandle) desHdl ).setExternalScript( getEditorText( ) );
				}
				else if ( cmbItemLastSelected != null )
				{
					desHdl.setStringProperty( cmbItemLastSelected.getName( ),
							getEditorText( ) );
					selectionMap.put( getModel( ),
							cmbExprListViewer.getSelection( ) );
				}
			}
			catch ( SemanticException e )
			{
				ExceptionHandler.handle( e );
				return false;
			}
		}
		return true;
	}
	/**
	 * Saves input code to model
	 * 
	 */
	public void saveModel( )
	{