Feature Request - Highlight Playlist items in Library

[Overcast]

I often find it difficult to manage large playlists in terms of time. Media Monkey makes it far easier to begin with; but a feature that would be really nice would be something that can highlight or otherwise identify items in the library that are in the playlist loaded in the 'now playing' section. Or perhaps the ability to filter/hide items in the library that are loaded in the 'now playing' section.