UI: Only show DLC RomFS button under Extract Data when DLCs are available.

Also convert the constructor of DlcSelectViewModel to expect a normal title id and not one already converted to the base ID.

src/Ryujinx/UI/Controls/ApplicationContextMenu.axaml

@@ -98,6 +98,7 @@
             Header="{locale:Locale GameListContextMenuExtractDataRomFS}"
             ToolTip.Tip="{locale:Locale GameListContextMenuExtractDataRomFSToolTip}" />
         <MenuItem
+            IsVisible="{Binding HasDlc}"
             Click="ExtractAocRomFs_Click"
             Header="{locale:Locale GameListContextMenuExtractDataAocRomFS}"
             ToolTip.Tip="{locale:Locale GameListContextMenuExtractDataAocRomFSToolTip}" />

src/Ryujinx/UI/Controls/ApplicationContextMenu.axaml.cs

@@ -378,7 +378,7 @@ namespace Ryujinx.Ava.UI.Controls
             if (sender is not MenuItem { DataContext: MainWindowViewModel { SelectedApplication: not null } viewModel })
                 return;
 
-            DownloadableContentModel selectedDlc = await DlcSelectView.Show(viewModel.SelectedApplication.IdBase, viewModel.ApplicationLibrary);
+            DownloadableContentModel selectedDlc = await DlcSelectView.Show(viewModel.SelectedApplication.Id, viewModel.ApplicationLibrary);
             
             if (selectedDlc is not null)
             {

src/Ryujinx/UI/ViewModels/DlcSelectViewModel.cs

@@ -34,9 +34,7 @@ namespace Ryujinx.Ava.UI.ViewModels
         
         public DlcSelectViewModel(ulong titleId, ApplicationLibrary appLibrary)
         {
-            _dlcs = appLibrary.DownloadableContents.Items
-                .Where(x => x.Dlc.TitleIdBase == titleId)
-                .Select(x => x.Dlc)
+            _dlcs = appLibrary.FindDlcsFor(titleId)
                 .OrderBy(it => it.IsBundled ? 0 : 1)
                 .ThenBy(it => it.TitleId)
                 .ToArray();

src/Ryujinx/UI/ViewModels/MainWindowViewModel.cs

@@ -481,6 +481,8 @@ namespace Ryujinx.Ava.UI.ViewModels
             }
         }
 
+        public bool HasDlc => ApplicationLibrary.HasDlcs(SelectedApplication.Id);
+
         public string CacheLoadStatus
         {
             get => _cacheLoadStatus;