Bug 201042 [Accessibility]Chart scritp should not add by auto when click the down in keyboard[17]
Description: Chart scritp should not add by auto when click the down in keyboard[0704] Step: 1. New a chart and switch to script view. 2. Let the point on the script function selection. 3. Click the down on keyboard. Actual result: A function will add by auto. Expected result: Customer can not select the function under the second function by keyboard, and it should not be added by auto.
UI/org.eclipse.birt.report.designer.ui.editors.schematic/src/org/eclipse/birt/report/designer/internal/ui/editors/script/JSEditor.java
IStructuredContentProvider,
		ILabelProvider,
		ISelectionChangedListener
{
	protected static Logger logger = Logger.getLogger( JSSubFunctionListProvider.class.getName( ) );
	
	
	private JSEditor editor;
	public JSSubFunctionListProvider( JSEditor editor )