I don't know if I missed some settings or is this commonly known issue with Clementine...
I've tried different music players, and Clementine seems like the best fit. The only thing I'm missing is integration with the GNOME panel on my Ubuntu 18.04.
I tried Amarok, RhytmBox, Audacity and every one of these has the possibility to pause/play and skip to previous/next song when you click on a clock on the top bar, like in this image:
But I'm missing this feature in Clementine. The only way to do this is from Ubuntu dock, which I'm not used to.
Can this be somehow set up?