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.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/composites/TriggerDataComposite.java
txtBaseParm.setText( ( urlValue.getBaseParameterName( )
						.length( ) > 0 ) ? urlValue.getBaseParameterName( )
						: "" ); 
				txtValueParm.setText( ( urlValue.getValueParameterName( )
						.length( ) > 0 ) ? urlValue.getValueParameterName( )
						: "" ); 
				txtSeriesParm.setText( ( urlValue.getSeriesParameterName( )
						.length( ) > 0 ) ? urlValue.getSeriesParameterName( )
						: "" ); 
				break;
			case INDEX_2_TOOLTIP :
				this.slValues.topControl = cmpTooltip;
				TooltipValue tooltipValue = (TooltipValue) trigger.getAction( )
						.getValue( );
				
				txtTooltipText.setText( ( tooltipValue.getText( ) != null )
						? tooltipValue.getText( ) : "" ); 
				break;
			case INDEX_3_TOOGLE_VISABILITY :
				this.slValues.topControl = cmpVisiblity;
				
				
				
				
				
				break;
			case INDEX_4_SCRIPT :