[All Platforms][Audiobooks] Keep audiobooks separate from songs in Liked Songs

[nackend]

At the moment music tracks and radio plays/audiobooks are in the (I am not sure how this is called in English) favorite song playlist. So when I want to shuffle my favorite music the music will be mixed with parts of audiobooks. This stuff should be seperated. Thanks! :)

[Peter]

Updated on 2019-08-29

Marked as a new idea + edited title slightly :)

Make sure to also check out this and this similar idea.