Bug 34913: DataTables upgrade: Update CSS and option names

Bug 34913: DataTables upgrade: Update CSS and option names

This patch makes two categories of changes:

1. CSS changes to accommodate changes in DataTables default CSS and
   markup structure. I've tried to make sure all of our Koha-specific
   styles are still applying.

   This change necessitates a rebuild of staff interface CSS.

2. DataTables option names: In this version of DataTables you can't
   override a default which uses CamelCase (e.g. "pagingType") with one
   in "Hungarian" notation, e.g. "sPaginationType." Since we define many
   default options in prog/js/datatables.js in camel case, any template
   which previously used a Hungarian notation option to override the
   default has now been updated to use the CamelCase version.

   See https://datatables.net/upgrade/1.10-convert#Options for a summary
   of the different option name changes.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>