Address review comments, 2

include/start_menu.h

@@ -6,5 +6,8 @@
 void AppendToList(u8* list, u8* pos, u8 newEntry);
 void Task_StartMenuHandleInput(u8 taskId);
 void SetUpReturnToStartMenu(void);
+void ShowStartMenu(void);
+void Field_AskSaveTheGame(void);
+void CB2_SetUpSaveAfterLinkBattle(void);
 
 #endif // GUARD_START_MENU_H