Bug 151361 default value for reousrce folder user preference
When user does not sepecify the resourec foler user preference, can we make the current project folder (in IDE) or the current report design file's folder (in RCP) as the default value for the resource folder. This way, by default the current project folder is the resource folder where user can create their libs and images. Also please set the default user preference to be null when BIRT is freshly installed.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/ResourceEditDialog.java
*            if it's the second column.
		 */
		public ResourceSorter( boolean descent, boolean second )
		{
			super( );
			this.descent = descent;
			this.second = second;
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.jface.viewers.ViewerSorter#compare(org.eclipse.jface.viewers.Viewer,
		 *      java.lang.Object, java.lang.Object)
		 */
		public int compare( Viewer viewer, Object e1, Object e2 )
		{
			String name1;
			String name2;
			if ( viewer == null || !( viewer instanceof ContentViewer ) )
			{
				if ( descent )
				{
					name1 = e2.toString( );
					name2 = e1.toString( );
				}
				else
				{
					name1 = e1.toString( );
					name2 = e2.toString( );
				}