Look cleaner
Moved GenbarcodeLocation from products.lang to admin.lang
Translation of barcode internal engine string
Improved es_ES translations + replaced lang key in margins module admin page
Uniformize code for liste_array
Fix visibility of elements into product page (manage external users)
Merge branch 'develop' of git@github.com:Dolibarr/dolibarr.git into
develop

Conflicts:
	htdocs/comm/propal/class/propal.class.php
Fix: [ bug #855 ] Holiday approval email in French
Trad: Add ca_ES holiday translations
Merge pull request #890 from marcosgdf/translations

Improved translations