Bug 18735: Print Barcode as soon as adding an item

Bug 18735: Print Barcode as soon as adding an item

For testing
1) Look for any records.
2) Go to the material edit page.
3) Under Actions you will see Print label under Duplicate.
4) When you click Print Label, the relevant material will be redirected
to the Label Creator module in the Tools menu.

Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>