4bc2118f2747e82d9509d4da4db0058b02230870 Update: Moved the tab focus …

…(for keyboard access to ordering) to the ordering icon, rather than the full header cells. This makes a lot more sense as it acts as a button to trigger ordering, and it addresses a spec violation error which dictates that you cannot have `aria-sort` and `tabindex` on the same elements.

DD-3008
https://datatables.net/forums/discussion/79934

Sync to source repo @4bc2118f2747e82d9509d4da4db0058b02230870

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.1.8",
-    "last-sync": "15a28f0db351b32b446a20ab2d4accd6acbd9716"
+    "last-sync": "4bc2118f2747e82d9509d4da4db0058b02230870"
 }