Adding some components.

src/dawn/scene/item/SceneItemComponents.cpp

@@ -16,6 +16,7 @@ void SceneItemComponents::removeComponent(
 ) {
   auto it = std::find(components.begin(), components.end(), component);
   if(it == components.end()) return; //Not found?
+  it->get()->dispose();
   components.erase(it);
 }