fix: Start as Admin Error: Unable to open app when running elevated (#2411)

* fixed run-elevated error and powerpreview settings not working

* removed EXTENDED_STARTUPINFO_PRESENT flag

* removed test string

* Update Microsoft.PowerToys.Settings.UnitTest.csproj

* Rename PowerLauncher.cs to PowerLauncherViewModelTest.cs

src/core/Microsoft.PowerToys.Settings.UI.Lib/GeneralSettingsCustomAction.cs

@@ -0,0 +1,25 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Microsoft.PowerToys.Settings.UI.Lib
+{
+    public class GeneralSettingsCustomAction
+    {
+        [JsonPropertyName("action")]
+        public OutGoingGeneralSettings GeneralSettingsAction { get; set; }
+
+        public GeneralSettingsCustomAction()
+        {
+        }
+
+        public GeneralSettingsCustomAction(OutGoingGeneralSettings action)
+        {
+            GeneralSettingsAction = action;
+        }
+
+        public override string ToString()
+        {
+            return JsonSerializer.Serialize(this);
+        }
+    }
+}