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
private Composite cmpHighlight = null;
	private Composite cmpDPVisibility = null;
	
	private StackLayout slValues = null;
	private CTextCombo cmbTriggerType = null;
	private Combo cmbActionType = null;
	private ChartWizardContext wizardContext;
	private Button btnBaseURL;
	private Button btnAdvanced;
	private String sBaseURL = ""; 
	private boolean bEnableURLParameters;
	private boolean bEnableShowTooltipValue;
	private boolean bAdvanced = false;
	private EList triggersList;
	private Map triggersMap;
	private String lastTriggerType;
	
	private boolean needSaveWhenDisposing = false;
	private final static int INDEX_1_URL_REDIRECT = 1;
	private final static int INDEX_2_TOOLTIP = 2;
	private final static int INDEX_3_TOOGLE_VISABILITY = 3;
	private final static int INDEX_4_SCRIPT = 4;
	private final static int INDEX_5_HIGHLIGHT = 5;
	private final static int INDEX_6_CALLBACK = 6;
	private final static int INDEX_7_TOOGLE_DATAPOINT = 7;
	
	private TriggerSupportMatrix triggerMatrix;
	public TriggerDataComposite( Composite parent, int style, EList triggers,
			ChartWizardContext wizardContext,
			int iInteractivityType, boolean bEnableURLParameters,