Preparing for translations

src/MenuManager.h

@@ -145,6 +145,7 @@ namespace ZL {
 
 		void showAboutScreen();
 		void showSettingsScreen();
+		void showLanguageScreen();
 		void showLoadGameScreen();
 		void showSaveGameScreen();
 
@@ -233,6 +234,7 @@ namespace ZL {
 		std::shared_ptr<UiNode> mainMenuRoot;
 		std::shared_ptr<UiNode> aboutScreenRoot;
 		std::shared_ptr<UiNode> settingsScreenRoot;
+		std::shared_ptr<UiNode> languageScreenRoot;
 		std::shared_ptr<UiNode> loadSavedGameScreenRoot;
 		std::shared_ptr<UiNode> saveGameScreenRoot;