fix(tracker): handle `pageshow` events from bfcache

[ryanccn]

trafficstars

Changes

Adds a pageshow event handler to the tracker in order to handle navigations via the back/forward cache

Tests

• [x] This PR does not require tests

Changelog

• [x] This PR does not make a user-facing change

Documentation

• [x] This change does not need a documentation update

Dark mode

• [x] This PR does not change the UI