Bug 26118: Move translatable strings out of tags/review.tt and into tags-review.js

Bug 26118: Move translatable strings out of tags/review.tt and into tags-review.js

This patch removes the section of the tags review template which defined
strings for translation. They can now be embedded in the JavaScript
file, wrapped in the __() function.

To test, apply the patch and clear your browser cache if necessary.

- Go to Tools -> Tags and perform some actions which will trigger the
  use of translated strings in the interface. For instance:
  - Approving and rejecting tags
  - Testing tags which are approved, rejected, or unclassified.
    - Status messages for these operations should work correctly.

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/tags-review.js for
  translation, e.g.:

  msgid "Both subfield values should be filled or empty."
  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>