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
SelectionListener,
		Listener
{
	private transient Composite cmpContent = null;
	private transient Label lblStyle = null;
	private transient Label lblWidth = null;
	private transient Label lblColor = null;
	private transient LineStyleChooserComposite cmbStyle = null;
	private transient IntegerSpinControl iscWidth = null;