* Prevent clusterMatrices from being invalidated and re-computed in each updateItem lambda.
We do this by not setting _model->_needsUpdateClusterMatrices = true;
* Prevent redundant work if Model::enqueueLocationChange is called multiple times per frame.
We do this by introducing a preRenderLambdas map in the Application class.
Instead of adding work directly to the scene PendingChanges queue Model::enqueueLocationChange
adds a lambda to the Application preRenderLambdas map. The Application ensures that only one lambda will
be invoked for each model per frame.
115fd607a0