Bug 407846 [Accessibility]Underline of shortcut character for POJO datasource properties are not displayed.
data/org.eclipse.birt.data.oda.pojo.ui/src/org/eclipse/birt/data/oda/pojo/ui/util/Utils.java
{
		private static final long serialVersionUID = 1L;
		public int compare( File o1, File o2 )
		{
			if ( o1.isDirectory( ) && o2.isDirectory( ) )
			{
				return o1.getName( ).compareTo( o2.getName( ) );
			}