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
GridData layoutData = new GridData( );
		layoutData.horizontalIndent = 6;
		butReset.setLayoutData( layoutData );
		butReset.addSelectionListener( new SelectionListener( ) {
			public void widgetSelected( SelectionEvent e )
			{
				setEditorText( "" ); 
				markDirty( );
			}
			public void widgetDefaultSelected( SelectionEvent e )
			{
				widgetSelected( e );
			}
		} );
		
		butValidate = new Button( barPane, SWT.PUSH );
		butValidate.setText( Messages.getString( "JSEditor.Button.Validate" ) ); 
		layoutData = new GridData( );
		layoutData.horizontalIndent = 6;
		butValidate.setLayoutData( layoutData );
		butValidate.addSelectionListener( new SelectionAdapter( ) {
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse.swt.events.SelectionEvent)
			 */
			public void widgetSelected( SelectionEvent e )
			{
				doValidate( );
			}