Bug 32701: Fix I18N JavaScript libraries on self checkout help page

Bug 32701: Fix I18N JavaScript libraries on self checkout help page

The help page was missing the fixes from bug 28488. The missing
libraries are causing a JavaScript error on the page and likely
other issues.

To test:
* Make sure WebBasedSelfCheck is activated and configured
  Note: In ktd you don't need to configure anything, it's already set up.
* In the OPAC, go to:
  /cgi-bin/koha/sco/sco-main.pl
* Click on the link to the help in the top right corner
* Verify you see the error in the console:
  jQuery.Deferred exception: __ is not defined
* Apply patch
* Restart things
* Reload the page
* Veriy the errors are gone

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>