Bug 34081: Contextualization of "Approved" (one term) vs "Approved" (more than one...

Bug 34081: Contextualization of "Approved" (one term) vs "Approved" (more than one term), and other tag statuses

To test:

1. Apply patch

2. Install language

   ./misc/translator/translate install xx-XX

3. Update po files

   ./misc/translator/translate update xx-XX

4. View the xx-XX-messages.po file

   --> Strings for tag statuses for one tag should be separated from
       strings for statuses for multiple tags, with context Tags
       (single) or Tags (multiple)

5. Change the strings so you know which is which

   For example, in French, the approved status for a single tag would
   be "Approuvé" and for multiple tags would be "Approuvés" (with the
   plural s at the end)

6. Apply translations

   ./misc/translator/translate install xx-XX

7. Add tags through the OPAC
   7.1. In another tab, go to the OPAC
   7.2. Log in
   7.3. Search for a record
   7.4. From the detailed record, click Add tags
   7.5. Enter a tag and click Add

8. In the staff interface, go to Tools > Tags

9. Approve/Reject the tag
   --> The status in the table and on the button should be the singular
       status, the status in the summary on the right should be plural

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>