Apply particle effect parameter overrides when emitter is changed and when activated in the tree.

Source/Engine/Particles/ParticleEffect.cpp

@@ -546,6 +546,16 @@ void ParticleEffect::OnParticleSystemModified()
 }
 
 void ParticleEffect::OnParticleSystemLoaded()
+{
+    ApplyModifiedParameters();
+    auto& emitters = ParticleSystem.Get()->Emitters;
+    for (auto& emitter : emitters)
+    {
+        emitter.Loaded.BindUnique<ParticleEffect, &ParticleEffect::OnParticleEmitterLoaded>(this);
+    }
+}
+
+void ParticleEffect::OnParticleEmitterLoaded()
 {
     ApplyModifiedParameters();
 }
@@ -814,6 +824,10 @@ void ParticleEffect::OnActiveInTreeChanged()
         CacheModifiedParameters();
         Instance.ClearState();
     }
+    else
+    {
+        ApplyModifiedParameters();
+    }
 }
 
 void ParticleEffect::OnTransformChanged()

Source/Engine/Particles/ParticleEffect.h

@@ -387,6 +387,7 @@ private:
     void ApplyModifiedParameters();
     void OnParticleSystemModified();
     void OnParticleSystemLoaded();
+    void OnParticleEmitterLoaded();
 
 public:
     // [Actor]