Bug 7644 - Invalid markup in staff client language chooser

Bug 7644 - Invalid markup in staff client language chooser

This patch removes invalid markup from the language chooser
in the intranet. It also copies the markup and style of
the staff client include to the OPAC so the two are
more consistent. I hope that will make future changes
and debugging a little easier.

I believe this patch also fixes Bug 7366, "Language chooser
display problems."

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Patch fixes bug 7366, but there is still a difference between staff
and OPAC.
Installed languages: en, en-NZ, de-DE, fr-FR
Activated langauges: en, en-NZ, fr-FR
OPC shows English, staff shows en-NZ as label for the list.

Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>