make check off selections consistent between OI & STP format. Add 3 line over 3 line check off (check off [6] in menu)

change type of ‘CheckOffXtraLines’ from int to float

PROMS/VEPROMS.CSLA.Library/Format/PlantFormat.cs

@@ -1400,8 +1400,8 @@ namespace VEPROMS.CSLA.Library
 				return LazyLoad(ref _CheckOffWidAdjust, "@CheckOffWidAdjust");
 			} 
 		}
-		private LazyLoad<int?> _CheckOffXtraLines;
-		public int? CheckOffXtraLines
+		private LazyLoad<float?> _CheckOffXtraLines;
+		public float? CheckOffXtraLines
 		{
 			get
 			{