Merge branch 'getprefabroot' of https://github.com/Menotdan/FlaxEngine into Menotdan-getprefabroot

Source/Engine/Level/Actor.cpp

@@ -1356,6 +1356,21 @@ bool Actor::IsPrefabRoot() const
     return _isPrefabRoot != 0;
 }
 
+Actor* Actor::GetPrefabRoot()
+{
+    if (!this->HasPrefabLink())
+    {
+        return NULL;
+    }
+
+    Actor* result = this;
+    while (!result == NULL && !result->IsPrefabRoot())
+    {
+        result = result->GetParent();
+    }
+    return result;
+}
+
 Actor* Actor::FindActor(const StringView& name) const
 {
     Actor* result = nullptr;