Add-agent-buttons adds third element when rendering the view for apps (only in tests)

When working on https://github.com/solid/solid-ui/pull/232 I had to fix a test that broke. It's the test When "Add App" button is clicked > bar is simplified that is affected. It expects two elements to remain after Add App button is clicked, but for some reason three elements remain after the action.

This only happens in the test, I have not been able to reproduce it "manually".

I've tried to understand why this happens, but have succumbed to let it be for now, as there are more urgent matters to tend to. But creating this issue to track it, to revisit it when I have time, or if others are more lucky than me.

Beginne mit dem im Issue erwähnten Test When "Add App" button is clicked > bar is simplified und reproduziere den Fehler. Verfolge das Rendering, das durch die Add App-Aktion ausgeführt wird, um festzustellen, warum drei Elemente im Test verbleiben; als erledigt gilt, dass der Test konsistent zwei verbleibende Elemente beobachtet, ohne verwandtes Verhalten zu beeinträchtigen.