Fix: Editor - use non-jittered projection for post-TAA overlay grid

Add a managed `RenderView.GetOverlayProjection()` helper that returns the non-jittered projection once TAA has been resolved, and use it for editor overlay rendering paths.

Source/Editor/Gizmo/GridGizmo.cs

@@ -113,7 +113,8 @@ namespace FlaxEditor.Gizmo
                 if (cb != IntPtr.Zero)
                 {
                     var data = new Data();
-                    Matrix.Multiply(ref renderContext.View.View, ref renderContext.View.Projection, out var viewProjection);
+                    var projection = renderContext.View.GetOverlayProjection();
+                    Matrix.Multiply(ref renderContext.View.View, ref projection, out var viewProjection);
                     Matrix.Transpose(ref viewProjection, out data.ViewProjectionMatrix);
                     data.ViewPos = renderContext.View.WorldPosition;
                     data.GridColor = options.Viewport.ViewportGridColor;

Source/Engine/Graphics/RenderView.cs

@@ -33,6 +33,14 @@ namespace FlaxEngine
             NonJitteredProjection = Projection;
         }
 
+        /// <summary>
+        /// Gets projection matrix for overlay geometry rendered after temporal anti-aliasing has been resolved.
+        /// </summary>
+        public Matrix GetOverlayProjection()
+        {
+            return IsTaaResolved ? NonJitteredProjection : Projection;
+        }
+
         /// <summary>
         /// Initializes render view data.
         /// </summary>

Source/Engine/UI/UICanvas.cs

@@ -90,7 +90,7 @@ namespace FlaxEngine
             Matrix.Multiply(ref worldMatrix, ref renderContext.View.View, out Matrix viewMatrix);
             Matrix projectionMatrix = renderContext.View.Projection;
             if (worldSpace && (Canvas.RenderLocation == PostProcessEffectLocation.Default || Canvas.RenderLocation == PostProcessEffectLocation.AfterAntiAliasingPass))
-                projectionMatrix = renderContext.View.NonJitteredProjection; // Fix TAA jittering when rendering UI in world after TAA resolve
+                projectionMatrix = renderContext.View.GetOverlayProjection(); // Fix TAA jittering when rendering UI in world after TAA resolve
             Matrix.Multiply(ref viewMatrix, ref projectionMatrix, out Matrix viewProjectionMatrix);
 
             // Pick a depth buffer