Code style formatting and minor tweaks

#2800

Source/Editor/Utilities/ScreenUtilities.h

@@ -2,4 +2,5 @@
 
 #pragma once
 
+// [Deprecated in v1.12]
 #include "Engine/Platform/ScreenUtilities.h"

Source/Editor/Utilities/Utils.cs

@@ -1586,6 +1586,7 @@ namespace FlaxEditor.Utilities
 
         internal static bool UseCustomWindowDecorations(bool isMainWindow = false)
         {
+#if PLATFORM_SDL
             return Editor.Instance.Options.Options.Interface.WindowDecorations switch
             {
                 Options.InterfaceOptions.WindowDecorationsType.Auto => !Platform.SupportsNativeDecorations,
@@ -1594,6 +1595,11 @@ namespace FlaxEditor.Utilities
                 Options.InterfaceOptions.WindowDecorationsType.ClientSide => true,
                 _ => throw new ArgumentOutOfRangeException()
             };
+#elif PLATFORM_WINDOWS
+            return !Editor.Instance.Options.Options.Interface.UseNativeWindowSystem;
+#else
+            return false;
+#endif
         }
 
         internal static bool HideSingleTabWindowTabBars()