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/GanttLineAttributesComposite.java
else
			{
				cbVisible.setSelection( attributes.isVisible( ) );
			}
			boolean bUIEnabled = cbVisible.getSelection( );
			if ( bEnableStyles )
			{
				cmbStyle.setEnabled( bUIEnabled );
				lblStyle.setEnabled( bUIEnabled );
			}
			if ( bEnableWidths )
			{
				iscWidth.setEnabled( bUIEnabled );
				lblWidth.setEnabled( bUIEnabled );
			}
			if ( bEnableColor )
			{
				cmbColor.setEnabled( bUIEnabled );
				lblColor.setEnabled( bUIEnabled );
			}
		}
		if ( bEnableStyles )
		{
			if ( laCurrent == null )
			{
				cmbStyle.setLineStyle( getSWTLineStyle( LineStyle.SOLID_LITERAL ) );
			}
			else
			{
				cmbStyle.setLineStyle( getSWTLineStyle( attributes.getStyle( ) ) );