Bug 19777: Move template JavaScript to the footer: Serials, part 3

Bug 19777: Move template JavaScript to the footer: Serials, part 3

This patch modifies even more staff client serials templates so
that JavaScript is included in the footer instead of the header.

This patch adds a new JavaScript include, serials-toolbar.js, which is
required on pages which include serials-toolbar.inc.

To test, apply the patch and test the JavaScript-driven features of the
modified templates: All button controls, DataTables functionality, tabs,
etc.

 - Serials
   - Search for a subscription
     - Tabs, datatables, date pickers
     - Open a subscription for viewing
       - Tabs, toolbar buttons for delete, renew, and close.
   - Serial collection (in the sidebar menu)
     - Select all / clear all
     - Datatable
     - Print slip
     - Generate next

Signed-off-by: Claire Gravely <claire.gravely@bsz-bw.de>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>