Fixing minor bugs, added about screen

src/MenuManager.h

@@ -53,6 +53,7 @@ namespace ZL {
 		bool isQuestJournalOpen() const { return uiState_ == GameUiState::QuestJournal; }
 
 		void showMainMenu();
+		void showMenuAfterGameCompleted();
 		bool isMainMenuOpen() const { return uiState_ == GameUiState::MainMenu; }
 
 		void openPhoneScreen();