Fix page number transition if on first page

PROMS/VEPROMS.CSLA.Library/Extension/ItemExt.cs

@@ -929,7 +929,7 @@ namespace VEPROMS.CSLA.Library
 		// dialog box that shows the step that causes the problem & a manual change will be necessary.
 		// This is a rare occurence so it was decided that the amount of coding effort to fix this 
 		// would be so much in comparison to having the user fix manually (RHM/KBR Feb 2014).
-		private int _PageNumber = 0;
+		private int _PageNumber = -1;
 		public int PageNumber
 		{
 			get { return _PageNumber; }