Bug 19758: Move template JavaScript to the footer: Serials, part 1

Bug 19758: Move template JavaScript to the footer: Serials, part 1

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

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

- Serials -> New subscription
  - Search for a vendor
    - "Choose" link and "Cancel" button should work correctly
  - Search for record
    - "Choose" link and "Cancel" button should word correctly
- Serials -> Add subscription fields
  - Datatable, delete confirmation
  - Edit
    - Form validation (submit both authorised value and MARC field)
- Serials -> Check expiration
  - Date picker in search form
  - Search
    - Renew button triggers popup
- Serials -> Claims -> Search results
  - Date picker, datatable, form validation
  - Select all/none; Download claims

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>