Updating group raise SaveCommand can execute

No need to click twice on history menu
Skipped first history entry as it is the same as the current entry
Stored SaveException innerexception as it is read more than once

ModernKeePass/ViewModels/SaveVm.cs

@@ -1,38 +1,54 @@
 using System.Threading.Tasks;
 using Windows.Storage;
 using Windows.Storage.AccessCache;
+using Windows.UI.Xaml.Controls;
 using MediatR;
 using Microsoft.Extensions.DependencyInjection;
 using ModernKeePass.Application.Database.Commands.CloseDatabase;
 using ModernKeePass.Application.Database.Commands.SaveDatabase;
+using ModernKeePass.Application.Database.Queries.GetDatabase;
+using ModernKeePass.Common;
+using ModernKeePass.Views;
 
 namespace ModernKeePass.ViewModels
 {
     public class SaveVm
     {
+        public bool IsSaveEnabled => _mediator.Send(new GetDatabaseQuery()).GetAwaiter().GetResult().IsDirty;
+
+        public RelayCommand SaveCommand { get; }
+        public RelayCommand CloseCommand { get; }
+        public Frame Frame { get; set; }
+
         private readonly IMediator _mediator;
+
         public SaveVm() : this(App.Services.GetRequiredService<IMediator>()) { }
 
         public SaveVm(IMediator mediator)
         {
             _mediator = mediator;
+            SaveCommand = new RelayCommand(async () => await Save(), () => IsSaveEnabled);
+            CloseCommand = new RelayCommand(async () => await Close());
         }
 
         public async Task Save(bool close = true)
         {
             await _mediator.Send(new SaveDatabaseCommand());
-            if (close) await Close();
+            if (close) await _mediator.Send(new CloseDatabaseCommand());
+            Frame.Navigate(typeof(MainPage));
         }
 
         public async Task Save(StorageFile file)
         {
             var token = StorageApplicationPermissions.FutureAccessList.Add(file);
             await _mediator.Send(new SaveDatabaseCommand { FilePath = token });
+            Frame.Navigate(typeof(MainPage));
         }
 
         public async Task Close()
         {
             await _mediator.Send(new CloseDatabaseCommand());
+            Frame.Navigate(typeof(MainPage));
         }
     }
 }