fix: ensures download banner is shown for all users

[dzucconi]

The implementation issue stems from enabling page caching, which prevents page pre-fetching in numerous scenarios. Previously, route change completion was only being detected on routes where the loading bar appeared at the top of the screen. In this case, route completion status isn't relevant - we simply need to detect and display based on the number of routes, which is what this implementation now does.

There are two other call sites using this hook that require investigation to determine if additional refactoring opportunities exist.