Bug 21333: Add ability to add to basket from a new file

Bug 21333: Add ability to add to basket from a new file

This patch adds a workflow for adding to a basket from a file. It
removes the need to stage the file before going to the basket and allows
you to stage the file and return to the basket

To test:
1 - Have basket in acquissitions
2 - Click add to basket
3 - Note new option to 'Add from new file'
4 - Click it
5 - You will be sent to the record import tool
6 - Stage your file
7 - There is a link after staging 'Add records to basket'
8 - Click it
9 - Your items should be added

Signed-off-by: Sonia <sonia.bouis@univ-lyon3.fr>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>