e412ed5850e072210e68dba7a701a3291c64e88c Fix: When using a CSS select…

…or for the column selector (`-api columns()`) the order is now guaranteed to be in column index order.

https://datatables.net/forums/discussion/80079

Sync to source repo @e412ed5850e072210e68dba7a701a3291c64e88c

datatables.json

@@ -11,5 +11,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.1.8",
-    "last-sync": "d7fdab4d358a0beff9bc8eaf0139ada406293255"
+    "last-sync": "e412ed5850e072210e68dba7a701a3291c64e88c"
 }

js/dataTables.js

@@ -8583,7 +8583,8 @@
 				.map( function () {
 					return _fnColumnsFromHeader( this ); // `nodes` is column index complete and in order
 				} )
-				.toArray();
+				.toArray()
+				.sort();
 
 			if ( jqResult.length || ! s.nodeName ) {
 				return jqResult;

js/dataTables.mjs

@@ -8530,7 +8530,8 @@ var __column_selector = function ( settings, selector, opts )
 			.map( function () {
 				return _fnColumnsFromHeader( this ); // `nodes` is column index complete and in order
 			} )
-			.toArray();
+			.toArray()
+			.sort();
 
 		if ( jqResult.length || ! s.nodeName ) {
 			return jqResult;