Bug 19672: Move tools templates JavaScript to the footer: More MARC tools

Bug 19672: Move tools templates JavaScript to the footer: More MARC tools

This patch modifies some staff client templates from the "Tools"
section so that JavaScript is included in the footer instead of the
header.

- Automatic item modifications by age
- MARC modification templates
- Stage MARC records for import
- Staged MARC record management

To test, apply the patch and test the JavaScript-driven features of
each modified template: All button controls, DataTables functionality,
form validation, etc.

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>