Implemented a new dialog for account re-ordering and required apis.

Wino.Mail/Services/DialogService.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Threading;
 using System.Threading.Tasks;
 using CommunityToolkit.Mvvm.Messaging;
@@ -331,6 +332,14 @@ namespace Wino.Services
             return accountPicker.PickedAccount;
         }
 
+        public async Task ShowAccountReorderDialogAsync(ObservableCollection<IAccountProviderDetailViewModel> availableAccounts)
+        {
+            var accountReorderDialog = new AccountReorderDialog(availableAccounts)
+            {
+                RequestedTheme = _themeService.RootTheme.ToWindowsElementTheme()
+            };
 
+            await HandleDialogPresentationAsync(accountReorderDialog);
+        }
     }
 }