Bug 12150 - Use more javascript string formatting in intranet for translated strings.

Bug 12150 - Use more javascript string formatting in intranet for translated strings.

http://bugs.koha-community.org/show_bug.cgi?id=12150

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>

No bug number on description
No commit message
No test plan
No koha-qa errors

I only signed this because it's useful for translations
but we can live without it, so is up to QA now

Tested some easy messages (e.g. syspref saving), and
updated PO files to check new strings.
Inspected the code, I think that there are no errors.

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>