Fixing possible Deadlock in AutoCleanForm

Fix documentation inaccuracy

Thanks !

README.md

@@ -170,10 +170,8 @@ public class StartForm : FormBase
         }
 		
 	    //Gets invoked during Navigation to this form
-        public override async Task Init(params object[] param)
-        {
 
-        }
+        //Init() got replaced with event handler
 		
     	//Opened() got replaced with event handler
 

TelegramBotBase/Form/AutoCleanForm.cs

@@ -149,9 +149,16 @@ namespace TelegramBotBase.Form
                 try
                 {
                     parallelQuery.ForAll(i =>
+                    {
+                        try
                         {
                             Device.DeleteMessage(i).GetAwaiter().GetResult();
                             deletedMessages.Add(i);
+                        }
+                        catch (ApiRequestException req) when (req.ErrorCode == 400)
+                        {
+                            deletedMessages.Add(i);
+                        }
                     });
                 }
                 catch (AggregateException ex)
@@ -160,7 +167,7 @@ namespace TelegramBotBase.Form
 
                     var retryAfterSeconds = ex.InnerExceptions
                         .Where(e => e is ApiRequestException apiEx && apiEx.ErrorCode == 429)
-                        .Max(e =>(int?) ((ApiRequestException)e).Parameters.RetryAfter) ?? 0;
+                        .Max(e => (int?)((ApiRequestException)e).Parameters.RetryAfter) ?? 0;
                     retryAfterTask = Task.Delay(retryAfterSeconds * 1000);
                 }
 
@@ -182,9 +189,16 @@ namespace TelegramBotBase.Form
                     try
                     {
                         parallelQuery.ForAll(i =>
+                        {
+                            try
                             {
                                 Device.DeleteMessage(i).GetAwaiter().GetResult();
                                 deletedMessages.Add(i);
+                            }
+                            catch (ApiRequestException req) when (req.ErrorCode == 400)
+                            {
+                                deletedMessages.Add(i);
+                            }
                         });
                     }
                     catch (AggregateException ex)