Bug 9473: Use DataTables on tags list page

Bug 9473: Use DataTables on tags list page

Replace the tablesorter plugin with the DataTables plugin on the tags
list page.

To test, got to tags moderation and click on a term which tags
multiple titles. On the tags list page, confirm that table sorting works
correctly.

Revision makes default result count (20) match options for number of
pagination entries (10,20,50,100,all).

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>