IgnoreState and SaveState addings for better session serialization

- adding IgnoreState to all ModalDialogs to prevent them get saved.
- adding SaveState to AutoCleanForm to keep state
- change OldMessages property of AutoCleanForm to public

TelegramBotBase/Form/AlertDialog.cs

@@ -4,6 +4,7 @@ using System.ComponentModel;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
+using TelegramBotBase.Attributes;
 using TelegramBotBase.Base;
 
 namespace TelegramBotBase.Form
@@ -11,6 +12,7 @@ namespace TelegramBotBase.Form
     /// <summary>
     /// A simple prompt dialog with one ok Button
     /// </summary>
+    [IgnoreState]
     public class AlertDialog : ConfirmDialog
     {
         public String ButtonText { get; set; }

TelegramBotBase/Form/ArrayPromptDialog.cs

@@ -5,6 +5,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using TelegramBotBase.Args;
+using TelegramBotBase.Attributes;
 using TelegramBotBase.Base;
 
 namespace TelegramBotBase.Form
@@ -12,11 +13,11 @@ namespace TelegramBotBase.Form
     /// <summary>
     /// A prompt with a lot of buttons
     /// </summary>
+    [IgnoreState]
     public class ArrayPromptDialog : FormBase
     {
         public String Message { get; set; }
 
-
         public ButtonBase[][] Buttons { get; set; }
 
         [Obsolete]

TelegramBotBase/Form/AutoCleanForm.cs

@@ -5,6 +5,7 @@ using System.Text;
 using System.Threading.Tasks;
 using Telegram.Bot.Types;
 using TelegramBotBase.Args;
+using TelegramBotBase.Attributes;
 using TelegramBotBase.Base;
 using TelegramBotBase.Enums;
 
@@ -15,10 +16,13 @@ namespace TelegramBotBase.Form
     /// </summary>
     public class AutoCleanForm : FormBase
     {
-        List<Message> OldMessages { get; set; }
+        [SaveState]
+        public List<Message> OldMessages { get; set; }
 
+        [SaveState]
         public eDeleteMode DeleteMode { get; set; }
 
+        [SaveState]
         public eDeleteSide DeleteSide { get; set; }
 
         

TelegramBotBase/Form/ConfirmDialog.cs

@@ -5,15 +5,16 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using TelegramBotBase.Args;
+using TelegramBotBase.Attributes;
 using TelegramBotBase.Base;
 
 namespace TelegramBotBase.Form
 {
+    [IgnoreState]
     public class ConfirmDialog : ModalDialog
     {
         public String Message { get; set; }
 
-
         public List<ButtonBase> Buttons { get; set; }
 
         private EventHandlerList __Events { get; set; } = new EventHandlerList();

TelegramBotBase/Form/PromptDialog.cs

@@ -5,10 +5,12 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using Telegram.Bot.Types.ReplyMarkups;
+using TelegramBotBase.Attributes;
 using TelegramBotBase.Base;
 
 namespace TelegramBotBase.Form
 {
+    [IgnoreState]
     public class PromptDialog : ModalDialog
     {
         public String Message { get; set; }