Add autocleanup for Guess and Roll handlers

Core/CommonHandler.cs

@@ -24,7 +24,7 @@ namespace Kruzya.TelegramBot.Core
             Db = db;
         }
 
-        protected async Task<Message> Reply(string text)
+        protected virtual async Task<Message> Reply(string text)
         {
             return await Bot.SendTextMessageAsync(Chat.Id, text,
                 replyToMessageId: Message?.MessageId, parseMode: ParseMode.Html);