6aa59fd5cc50b89052ce6a5b8b1112ceb9d999cb Fix: When columns are hidden…

… and ordering, they should still have the header classes applied to indicate ordering.

https://datatables.net/forums/discussion/79453

dd2fa24bf1b1cadf911521f34ac1f9dc1a1d66bf Merge branch 'master' of github.com:DataTables/DataTablesSrc

Sync to source repo @dd2fa24bf1b1cadf911521f34ac1f9dc1a1d66bf

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.1.0",
-    "last-sync": "4a816880efa39bb7867dab8495e8971d1f4b8893"
+    "last-sync": "dd2fa24bf1b1cadf911521f34ac1f9dc1a1d66bf"
 }