Bug 26243: Move translatable strings out of templates and into circulation.js

Bug 26243: Move translatable strings out of templates and into circulation.js

This patch removes the definition of translatable strings out of
templates and into the corresponding JavaScript file, using the new JS
i81n function.

To test:

- Apply the patch and check out to a patron.
- If there are none on the account, add a new message using the "Add a
  new message" link.
- Click "Delete" for that message.
- You should get a confirmation message, "Are you sure you want to
  delete this message? This cannot be undone."
- If necessary, enable the ExportCircHistory system preference.
- Check out to a patron who has one or more items checked out.
- Wihtout checking any checkboxes, click the "Export" button at the
  bottom of the page.
- You should get an error message, "You must select checkout(s) to
  export."
- Add a restriction the patron's account.
- Delete the restriction. You should get a confirmation message, "Remove
  restriction?"
- Perform the same tests from the patron detail page.

TESTING TRANSLATABILITY

- Update a translation, e.g. fr-FR:

  > cd misc/translator
  > perl translate update fr-FR

- Open the corresponding .po file for JavaScript strings, e.g.
  misc/translator/po/fr-FR-messages-js.po
- Locate strings pulled from
  koha-tmpl/intranet-tmpl/prog/js/pages/circulation.js for translation,
  e.g.:

  msgid "You must select checkout(s) to export"
  msgstr ""

- Edit the "msgstr" string however you want (it's just for testing).
- Install the updated translation:

  > perl translate install fr-FR

- Switch to your newly translated language in the staff client
  and repeat the test plan above. The translated strings should
  appear.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 111b14dc965d51561add33d94eaf18616a815e88)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>