Revert "ENYO-655: Removing modelsAdded optimization to fix pagination bugs"

This reverts commit 46ae2e0aabc9f45c690b7f7b0f2021f2a0bb7b2f.

Due to changes made when fixing BHV-19877, we can now restore the
modelsAdded optimization we recently removed.

Enyo-DCO-1.1-Signed-Off-By: Gray Norton (gray.norton@lge.com)