Initial Add of Brazilian Portuguese translation (#5043)

Team:

https://github.com/DvoraGames
https://github.com/jcalmeida85
https://github.com/ramorimdias
https://github.com/Caminhaleonel

src/slic3r/GUI/GUI_App.cpp

@@ -6027,6 +6027,7 @@ wxString GUI_App::current_language_code_safe() const
 		{ "zh", 	"zh_CN", },
 		{ "ru", 	"ru_RU", },
         { "tr", 	"tr_TR", },
+        { "pt", 	"pt_BR", },
 	};
 	wxString language_code = this->current_language_code().BeforeFirst('_');
 	auto it = mapping.find(language_code);