Bug 146159 [Regression]Changing font operation doesn't work other than the first time
Description: The first time changing operation can work well. However, Change it again, it won't work. Steps: 1.Insert lable/text to layout or master page 2.Change the font from serif to cursive, it works well 3.Change the font again Result: The action doesn't work Additional infor: build number:200606080632
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
public static final String TYPE_GROUP_GROUP = "group";
	/**
	 * other container, has none group.
	 */
	public static final String TYPE_GROUP_NONE = "none";
	/**
	 * Return the group container type of the given element handle.
	 * 
	 * @param handle
	 *            the handle of the element.
	 * @return the group container type of the given element.
	 */
	public static String getGroupControlType( DesignElementHandle handle )
	{
		if ( handle instanceof ListingHandle )
		{
			return TYPE_GROUP_LISTING;
		}
		DesignElementHandle result = handle.getContainer( );
		if ( result != null )
		{
			if ( result instanceof GroupHandle )
			{
				return TYPE_GROUP_GROUP;
			}
			return getGroupControlType( result );
		}
		return TYPE_GROUP_NONE;
	}
}