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
implements
			SelectionListener
{
	private Group grpValue = null;
	private Composite cmpURL = null;
	
	
	private Group grpParameters = null;
	private Text txtBaseParm = null;
	private Text txtValueParm = null;
	private Text txtSeriesParm = null;
	private Composite cmpCallback = null;
	private Composite cmpDefault = null;
	private Composite cmpScript = null;
	private Text txtScript = null;
	
	private Button btnScriptExpBuilder = null;
	private Composite cmpTooltip = null;
	
	private Text txtTooltipText = null;
	private Button btnTooltipExpBuilder = null;
	private Composite cmpVisiblity = null;