delegates_item_states.qml regression

Regression visible between 5.9.0 and 5.9.

Test: /benchmarks/auto/creation/quick.item/delegates_item_states.qml
Grafana: https://testresults.qt.io/grafana/dashboard/db/qmlbench-branches?panelId=119&fullscreen&orgId=1&var-suite=creation%2Fquick.item&var-benchmark=All&var-branch=v5.9.0&var-branch=5.9&var-branch=5.6&var-hardwareId=eskil_linux_tx1&from=now-1y&to=now