Merge remote-tracking branch 'origin/master' into 1.13

# Conflicts:
#	Flax.flaxproj
#	Source/Engine/Level/Actors/StaticModel.cpp
#	Source/Engine/Level/Prefabs/Prefab.cpp
#	Source/Engine/Tools/ModelTool/ModelTool.cpp

Source/Engine/Graphics/Async/GPUTasksContext.cpp

@@ -76,9 +76,10 @@ void GPUTasksContext::OnFrameBegin()
     {
         auto task = _tasksSyncing[i];
         auto state = task->GetState();
+        if (EnumHasAllFlags(task->Flags, ObjectFlags::WasMarkedToDelete))
+            state = TaskState::Finished;
         if (task->GetSyncPoint() <= _currentSyncPoint && state != TaskState::Finished)
         {
-            // TODO: add stats counter and count performed jobs, print to log on exit.
             task->Sync();
         }
         if (state == TaskState::Failed || state == TaskState::Canceled)