894ecbf26880e6c483eedf453c952cb514c7c57b Fix: Performance issue when column sizing was specified and scrolling enabled

The issue was that a reflow was being forced once for every column. The
fix is to batch process them. Insert all into the DOM, calculate their
sizes with a single reflow and then remove them all.

Sync to source repo @894ecbf26880e6c483eedf453c952cb514c7c57b

Author: AllanJard

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "1.13.6",
-    "last-sync": "b2103f39ce160ad1daec16a6915343d15b31f016"
+    "last-sync": "894ecbf26880e6c483eedf453c952cb514c7c57b"
 }