Add artist view

[panmona]

I like to listen to tracks by a specific artist. So I suggest adding an artist page that lists all your artists, you can click on one and you will find all saved songs from this artists.

This feature was once in the spotify desktop client but is now gone.. On mobile it's still kinda there but it needs two clicks now.

[pythonhacker]

Not sure if there is another issue open for Artist icon, but would be nice to see some Artist artwork (icon/image) in the playing area which is kind of dead empty right now.