Bug 29261: (bug 15812 follow-up) Fix translation issue in include file

Bug 29261: (bug 15812 follow-up) Fix translation issue in include file

Strings must be surrounded by double quote or it wil break the translate
script.

Without this patch you get:
  5  "dt_name":
  6  "<a %]\"="%]\""
in the translated template and the UI explodes with "Template process
failed: file error - parse error"

Test plan:
Apply this patch, update PO files for a given language, translate
"View". Search for something like:
  msgid "\\\"View\\\""
  msgstr "\\\"Näytä\\\""
Remove fuzzy.
Install the language and search for patrons

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>