Group playlists by %album artist% instead of %album% ?

[Guga-CL]

So in the Library you can right-click an empty space between the album images or click the '...' > Group by > Custom titleformat
Then on the 'first line' you have %album artist% and you leave the 'second line' empty/blank.

This works great, I get a simple list grouped by artists (ignoring album).

Is there a way to do the same for the Playlists/ right panel playlist ?

Thanks.