When starting some operations, the user can get the impression that nothing is happening. Many actions (MusicBrainz lookups, and the Cluster / Lookup / Analyze actions) run in the background and their result is not immediately visible. The only feedback today is a status-bar message, which is easy to miss, so the application can feel unresponsive right after a click.

We should give the user immediate feedback that their action was registered, using a solution that is simple and works across all platforms (Linux, macOS, Windows).