[Reasoning]

Spotify just made the 'brilliant' decision to remove the "Add this song to the playlist" button. Now to add songs that Spotify itself recommends based on the playlist you're listening to you have to, right-click the name, select "Add to playlist", scroll to find the playlist you're currently listening to and select it. Before there was a single button to do this.

But at least I got more whitespace on my screen now...