Fix crashing after opening a uri on browser (#17524)

* Fix crashing after opening a uri on browser

* Update NavigationHelper.cs

src/Browser/Avalonia.Browser/Interop/NavigationHelper.cs

@@ -16,7 +16,7 @@ internal static partial class NavigationHelper
             .OnBackRequested() ?? false;
         return Task.FromResult(handled);
     }
-    
+
-    [JSImport("globalThis.open")]
+    [JSImport("NavigationHelper.openUri", AvaloniaModule.MainModuleName)]
-    public static partial JSObject? WindowOpen(string uri, string target);
+    public static partial bool WindowOpen(string uri, string target);
 }

src/Browser/Avalonia.Browser/Storage/BrowserLauncher.cs

@@ -13,8 +13,7 @@ internal class BrowserLauncher : ILauncher
 
         if (uri.IsAbsoluteUri)
         {
-            var window = NavigationHelper.WindowOpen(uri.AbsoluteUri, "_blank");
+            return Task.FromResult(NavigationHelper.WindowOpen(uri.AbsoluteUri, "_blank"));
-            return Task.FromResult(window is not null);
         }
         return Task.FromResult(false);
     }

src/Browser/Avalonia.Browser/webapp/modules/avalonia/navigationHelper.ts

@@ -11,4 +11,8 @@ export class NavigationHelper {
             }
         };
     }
+
+    public static openUri(uri?: string, target?: string) {
+        return !!window.open(uri, target);
+    }
 }