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/src/org/eclipse/birt/report/designer/internal/ui/dialogs/ExpressionTreeSupport.java
{
			return true;
		}
		for ( Iterator iter = filters.iterator( ); iter.hasNext( ); )
		{
			Object obj = iter.next( );
			if ( obj instanceof ExpressionFilter )
			{
				if ( !( (ExpressionFilter) obj ).select( this, treeName ) )
				{
					return false;
				}
			}
		}
		return true;
	}
	/**
	 * Create operators band.Must set Tree before execution.
	 * 
	 */
	public void createOperatorsTree( )
	{
		Assert.isNotNull( tree );
		TreeItem topItem = createTopTreeItem( tree, TREE_ITEM_OPERATORS );
		TreeItem subItem = createSubFolderItem( topItem, TREE_ITEM_ASSIGNMENT );
		createSubTreeItems( subItem, OPERATORS_ASSIGNMENT, IMAGE_OPERATOR );
		subItem = createSubFolderItem( topItem, TREE_ITEM_COMPARISON );
		createSubTreeItems( subItem, OPERATORS_COMPARISON, IMAGE_OPERATOR );
		subItem = createSubFolderItem( topItem, TREE_ITEM_COMPUTATIONAL );
		createSubTreeItems( subItem, OPERATORS_COMPUTATIONAL, IMAGE_OPERATOR );