Make GtkWebViewEnvironmentRequestedEventArgs.ForceX11GdkBackend opt-out

Author: maxkatz6

src/Avalonia.Controls.WebView.Core/Platform/GtkWebViewEnvironmentRequestedEventArgs.cs

@@ -24,10 +24,7 @@ internal GtkWebViewEnvironmentRequestedEventArgs(DeferralManager deferralManager
     /// Gets or sets a value indicating whether GDK_BACKEND should be forced to "x11" while GTK is initialized.
     /// The GTK adapters require the x11 GDK backend, and a Wayland desktop usually pre-sets GDK_BACKEND=wayland, which makes gtk_init fail.
     /// </summary>
-    /// <remarks>
-    /// Disabled by default, as it temporarily mutates the process environment. The previous value is restored once GTK is initialized.
-    /// </remarks>
-    public bool ForceX11GdkBackend { get; set; }
+    public bool ForceX11GdkBackend { get; set; } = true;
 
     /// <summary>
     /// Gets or sets a value indicating whether the webview should use an ephemeral data manager, handling all website data as non-persistent and not writing anything to client storage.