Bug 19960: Update popup window templates to use Bootstrap grid: Add to list

Bug 19960: Update popup window templates to use Bootstrap grid: Add to list

This patch updates add-to-list template to use the Bootstrap grid
instead of the YUI grid.

To test, open the detail page for a bibliographic record in the staff
client and choose "Add to -> List." The resulting pop-up window should
look correct.

Signed-off-by: Zoe Bennett <zoebennett1308@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>