CRM-14816 Order Rows widget is broken again

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* CRM-14816: Order Rows widget is broken again
  https://issues.civicrm.org/jira/browse/CRM-14816

The jquery lib for Datatable.js had been changed to 1.10 from 1.8.
Hence the ordering icon were not shown in the table.

This changes means datatable css is now included on all the pages. How was it included earlier?