Changed CellColorGetterDelegate to use its own class for args CellColorGetterArgs to future proof the API against breaking changes

UICatalog/Scenarios/TableEditor.cs

@@ -319,9 +319,9 @@ namespace UICatalog.Scenarios {
 								// not a double
 								TextAlignment.Left,
 				
-				ColorGetter = (i,v)=>v is double d ? 
+				ColorGetter = (a)=> a.CellValue is double d ? 
 								// color 0 and negative values red
-								d <= 0.0000001 ? i%2==0 && miAlternatingColors.Checked ? redColorSchemeAlt: redColorScheme : 
+								d <= 0.0000001 ? a.RowIndex%2==0 && miAlternatingColors.Checked ? redColorSchemeAlt: redColorScheme : 
 								// use normal scheme for positive values
 								null:
 								// not a double

UnitTests/TableViewTests.cs

@@ -511,7 +511,7 @@ namespace Terminal.Gui.Views {
 
 			// when B is 2 use the custom highlight colour
 			ColorScheme cellHighlight = new ColorScheme () { Normal = Attribute.Make (Color.BrightCyan, Color.DarkGray) };
-			bStyle.ColorGetter = (rowIdx, value) => Convert.ToInt32(value) == 2 ? cellHighlight : null;
+			bStyle.ColorGetter = (a) => Convert.ToInt32(a.CellValue) == 2 ? cellHighlight : null;
 
 			tv.Redraw (tv.Bounds);