Initial page loading spinner never hides in some scenarios

[JammingBen]

Describe the bug

The initial page loading spinner never hides in scenarios where we don't load all apps. This is due to the fact that the spinner only gets removed via a callback after all apps have been loaded.

Steps to reproduce

1. Go to https://host.docker.internal:9200/access-denied
2. Enjoy the endless loading state

Expected behavior

The loading spinner eventually disappears.

Actual behavior

It stay forever on such pages.

This is a regression from #11054.

[kulmann]

I can't reproduce it with current master 🙈 neither mit vite nor with a production build.

[JammingBen]

Now I can't either... but it's a timing issue. The loading spinner appears after 0.5 seconds. Meaning if the page loads faster than that, everything is fine. But if it's slower, then the loading spinner will appear and never go away.