revise NavigationDrawer

SimplySecure criticised that the open drawer at the beginning confuses users. They think it is the first fragment.

Suggestions:

• animate the drawer (let it vanish after a second or so)

from #8883 (closed) : At the moment, the navigation drawer opens on the first use to give the user a hint it exists and how to handle it. Even if it's a pattern that comes from google's ui guidelines / example code it seems to be confusing. We should reevaluate that - and can discuss it during the UX review.

From @elijah:

on first launch, it opened with the side panel expanded for me, which was super confusing. Maybe because I already had a provider configured and it wanted to show what the provider was? I think the provider name should be on the main panel