I am a bit embarassed lol but in my quest to hide all the menu entries that I won’t use (and make the user experience much lighter by actually only leaving only what I do regularly use)… I accidentally hidden the menu entry “add to favorites” and I can’t for the sake of the holy cannoli find how to put it back.
Please guide me!
Many thanks everyone,
Settings » User Interface » Menú Item Visibility 
I went there at least ten times! Then what?
Show favorites is ON and is about the menu entry on the left, that is indeed visibile; but it’s not about the sub-menu you get when you open a playlist entry.
Thank you,
Settings » User Interface » Menú Item Visibility » Show ‘Favorites’
Displays favorites in the main menu on the left.
Settings » User Interface » Menú Item Visibility » Quick Menu » Show ‘Add to Favorites’
Show the option in the sub menu, you mention.
Thank you! It was searching for something specific to the playlist menu, which admittedly is not the quick menu.
Apparently removing it from the quick menu removes it from both places.
I opened a separate thread about this.