Fix: Always set content dialog root

Author: yaira2

src/Files.App/Services/UpdateService.cs

@@ -151,6 +151,15 @@ private static async Task<bool> ShowDialogAsync()
 			return result == ContentDialogResult.Primary;
 		}
 
+		// WINUI3
+		private ContentDialog SetContentDialogRoot(ContentDialog contentDialog)
+		{
+			if (Windows.Foundation.Metadata.ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 8))
+				contentDialog.XamlRoot = MainWindow.Instance.Content.XamlRoot;
+
+			return contentDialog;
+		}
+
 		public async Task CheckLatestReleaseNotesAsync(CancellationToken cancellationToken = default)
 		{
 			if (!IsAppUpdated)

src/Files.App/Utils/Archives/DecompressHelper.cs

@@ -247,6 +247,15 @@ public static async Task DecompressArchiveToChildFolderAsync(IShellPage associat
 			}
 		}
 
+		// WINUI3
+		private static ContentDialog SetContentDialogRoot(ContentDialog contentDialog)
+		{
+			if (Windows.Foundation.Metadata.ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 8))
+				contentDialog.XamlRoot = MainWindow.Instance.Content.XamlRoot;
+
+			return contentDialog;
+		}
+
 		private static async Task<SevenZipExtractor?> GetZipFile(BaseStorageFile archive, string password = "")
 		{
 			return await FilesystemTasks.Wrap(async () =>

src/Files.App/Utils/RecycleBin/RecycleBinHelpers.cs

@@ -109,6 +109,15 @@ public static async Task RestoreSelectionRecycleBinAsync(IShellPage associatedIn
 				await RestoreItemAsync(associatedInstance);
 		}
 
+		// WINUI3
+		private static ContentDialog SetContentDialogRoot(ContentDialog contentDialog)
+		{
+			if (Windows.Foundation.Metadata.ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 8))
+				contentDialog.XamlRoot = MainWindow.Instance.Content.XamlRoot;
+
+			return contentDialog;
+		}
+
 		public static async Task<bool> HasRecycleBin(string? path)
 		{
 			if (string.IsNullOrEmpty(path) || path.StartsWith(@"\\?\", StringComparison.Ordinal))

src/Files.App/Utils/Storage/Operations/FilesystemOperations.cs

@@ -937,6 +937,15 @@ await rawStorageHistory.SelectMany((item) => item.Source).ToListAsync(),
 			return null;
 		}
 
+		// WINUI3
+		private ContentDialog SetContentDialogRoot(ContentDialog contentDialog)
+		{
+			if (Windows.Foundation.Metadata.ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 8))
+				contentDialog.XamlRoot = MainWindow.Instance.Content.XamlRoot;
+
+			return contentDialog;
+		}
+
 		public Task<IStorageHistory> CreateShortcutItemsAsync(IList<IStorageItemWithPath> source, IList<string> destination, IProgress<StatusCenterItemProgressModel> progress, CancellationToken token)
 		{
 			throw new NotImplementedException("Cannot create shortcuts in UWP.");

src/Files.App/Views/LayoutModes/StandardLayoutMode.cs

@@ -332,6 +332,15 @@ protected void SelectionCheckbox_DoubleTapped(object sender, DoubleTappedRoutedE
 			e.Handled = true;
 		}
 
+		// WINUI3
+		private ContentDialog SetContentDialogRoot(ContentDialog contentDialog)
+		{
+			if (Windows.Foundation.Metadata.ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 8))
+				contentDialog.XamlRoot = MainWindow.Instance.Content.XamlRoot;
+
+			return contentDialog;
+		}
+
 		public override void Dispose()
 		{
 			base.Dispose();