Bug 19663: Move JS to the footer: Reports

Bug 19663: Move JS to the footer: Reports

This patch modifies the staff client's reports 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
reports pages: All button controls, DataTables functionality, form
validation, etc.

Signed-off-by: Claire Gravely <claire.gravely@bsz-bw.de>
Fix for QA: Remove unused Dopop function.

Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>