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
Label lblDefine = new Label( cmpURL, SWT.WRAP );
		{
			GridData gd = new GridData( );
			gd.horizontalIndent = 2;
			gd.horizontalSpan = 3;
			gd.widthHint = 200;
			lblDefine.setLayoutData( gd );
			lblDefine.setText( Messages.getString( "TriggerDataComposite.Label.Description" ) ); 
		}
		btnAdvanced = new Button( cmpURL, SWT.NONE );
		{
			GridData gd = new GridData( );
			gd.horizontalSpan = 2;
			btnAdvanced.setLayoutData( gd );
			btnAdvanced.setText( getAdvancedButtonText( bAdvanced ) );
			btnAdvanced.setToolTipText( Messages.getString( "TriggerDataComposite.Tooltip.Advanced" ) ); 
			btnAdvanced.addSelectionListener( this );
			btnAdvanced.setEnabled( bEnableURLParameters );
		}