[Feature Request] [Help needed] Prevent duplicate songs in playlist

[Sogolumbo]

I have a feature request for a different "Add to playlist" dialog which would work just like the youtube playlist system:

There you can see whether a song is already in a playlist. If it's already in there you can not add it a second time but remove it. I think this is an awesome functionality because especially with big, unsorted playlists it is frustrating and time consuming to find out, whether a song is already part of a playlist.

Another possible solution to the problem of duplicate songs would be a "Remove duplicates" menu item in the playlist view. It would just scan the selected playlist for any duplicates and remove them so there is only one copy in the playlist.

[Sogolumbo]

This Issue can be closed with the pull request #432

[ghost]

I would love to see this feature added.

[Sogolumbo]

We need help
The business logic is done. We just need someone to implement the material design. I don't know how that works and I currently don't have enough time to learn that.

[DNutz]

I too would love to see this feature added