Simplify async render flushing code

Source/Engine/Graphics/RenderTask.cpp

@@ -507,3 +507,10 @@ RenderContextBatch::RenderContextBatch(const RenderContext& context)
     Contexts.Add(context);
     EnableAsync = JobSystem::GetThreadsCount() > 1;
 }
+
+void RenderContextBatch::FlushWaitLabels()
+{
+    for (const int64 label : WaitLabels)
+        JobSystem::Wait(label);
+    WaitLabels.Clear();
+}

Source/Engine/Graphics/RenderTask.h

@@ -533,4 +533,9 @@ API_STRUCT(NoDefault) struct FLAXENGINE_API RenderContextBatch
     {
         return Contexts.Get()[0];
     }
+
+    /// <summary>
+    /// Waits for all scheduled async jobs to complete and clears WaitLabels.
+    /// </summary>
+    void FlushWaitLabels();
 };

Source/Engine/Renderer/Renderer.cpp

@@ -356,9 +356,7 @@ void Renderer::DrawActors(RenderContext& renderContext, const Array<Actor*>& cus
         Level::DrawActors(renderContextBatch, SceneRendering::DrawCategory::SceneDraw);
         Level::DrawActors(renderContextBatch, SceneRendering::DrawCategory::SceneDrawAsync);
         JobSystem::SetJobStartingOnDispatch(true);
-        for (const int64 label : renderContextBatch.WaitLabels)
-            JobSystem::Wait(label);
-        renderContextBatch.WaitLabels.Clear();
+        renderContextBatch.FlushWaitLabels();
     }
 }
 
@@ -483,9 +481,7 @@ void RenderInner(SceneRenderTask* task, RenderContext& renderContext, RenderCont
 
         // Wait for async jobs to finish
         JobSystem::SetJobStartingOnDispatch(true);
-        for (const int64 label : renderContextBatch.WaitLabels)
-            JobSystem::Wait(label);
-        renderContextBatch.WaitLabels.Clear();
+        renderContextBatch.FlushWaitLabels();
 
         // Perform custom post-scene drawing (eg. GPU dispatches used by VFX)
         for (int32 i = 0; i < renderContextBatch.Contexts.Count(); i++)