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
}
		if ( filter( TREE_NAME_PARAMETERS, filterList ) )
		{
			createParamtersTree( );
		}
		if ( filter( TREE_NAME_NATIVE_OBJECTS, filterList ) )
		{
			createNativeObjectsTree( );
		}
		if ( filter( TREE_NAME_BIRT_OBJECTS, filterList ) )
		{
			createBirtObjectsTree( );
		}
		if ( filter( TREE_NAME_OPERATORS, filterList ) )
		{
			createOperatorsTree( );
		}
	}
	/**
	 * Filters the tree name, given the filter list.
	 * 
	 * @param treeName
	 *            the tree name to be filtered.
	 * @param filters
	 *            the filter list.
	 * @return true if the tree name passes the filter list.
	 */
	private boolean filter( String treeName, List filters )
	{
		if ( filters == null )