message: Show lang tag in LanguageCtrl tooltip
diff: @@ -175,6 +175,8 @@ void LanguageCtrl::SetLang(const Language& lang)
  Init(lang);
  else
  SetValue(lang.FormatForRoundtrip());
  +
  + SetToolTip(lang.DisplayName() + "\n" + lang.LanguageTag());
  }
  Language LanguageCtrl::GetLang() const
  