Bug 34079: The phrase "Displaying [all|approved|pending|rejected] terms" was separated

Bug 34079: The phrase "Displaying [all|approved|pending|rejected] terms" was separated

This patch reunites the words for the sentence "Displaying
[all|approved|pending|rejected] terms" in order to facilitate
translating in languages that have a different syntax.

To test:
1. Install a new language

   ./misc/translator/translate install xx-XX

2. Check the xx-XX-staff-prog.po file for the sentence
   --> All the words are individual strings

3. Apply patch

4. Update the po files

   ./misc/translator/translate update xx-XX

5. Check the xx-XX-staff-prog.po file again
   --> The sentence is reunited for each status (Displaying all terms,
       Displaying approved terms, etc.)

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>
(cherry picked from commit 272a080cb35fe83e9f11ab8401effb7223f5d94c)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>