Labels UI

[zeppaman]

Thi features add the posisbility to add translation for exernal application. Transaltion will be saver into a collection in the form

{
  "key":"buttons.save",
  "it":"Salva",
  "en":"Save"
  "Application": appid
}

For each application, we have a set of enabled languages. The UI let you fill in a tabular form all translation, like this one

LABEL	EN	IT
button.save	save	salva
button.delete	delete	cancella