re #82 the default language select box options are hidden by default
re #82 update the default languages list depending of the selected
languages in available languages list for the seller
re #82 update template elements names
re #82 delete useless lines and update comments
re #82 update seller default language select box id
re #82 delete useless blank spaces in internationalization script
re #82 use magic variable for seller-default-language id
re #82 refractor code
re #82 delete blank spaces in generated strings
re #82 replace correctly methods in Internationalization
Merge pull request #104 from jean553/fix_82

Fix 82 - Update default languages list in real time, depending of availables languages