Deleting messages update

- new constant for how much message deletions per second
- updating AutoCleanForm "Cleanup" process to use constant and using MessageDeleted eventhandler

TelegramBotBase/Constants/Telegram.cs

@@ -21,5 +21,7 @@ namespace TelegramBotBase.Constants
 
         public const int MaxReplyKeyboardCols = 12;
 
+        public const int MessageDeletionsPerSecond = 30;
+
     }
 }

TelegramBotBase/Form/AutoCleanForm.cs

@@ -39,7 +39,6 @@ namespace TelegramBotBase.Form
 
         }
 
-
         private async Task AutoCleanForm_Init(object sender, InitEventArgs e)
         {
             if (this.Device == null)
@@ -127,17 +126,25 @@ namespace TelegramBotBase.Form
         /// </summary>
         /// <returns></returns>
         public async Task MessageCleanup()
+        {
+            while (this.OldMessages.Count > 0)
             {
                 var tasks = new List<Task>();
+                var msgs = this.OldMessages.Take(Constants.Telegram.MessageDeletionsPerSecond);
 
-            foreach (var msg in this.OldMessages)
+                foreach (var msg in msgs)
                 {
                     tasks.Add(this.Device.DeleteMessage(msg));
                 }
 
                 await Task.WhenAll(tasks);
 
-            this.OldMessages.Clear();
+                foreach(var m in msgs)
+                {
+                    Device.OnMessageDeleted(new MessageDeletedEventArgs(m));
+                    this.OldMessages.Remove(m);
+                }
+            }            
         }
     }
 }