Add Clear/Add option

[Stephanowicz]

Ok - but is it really necessary to check if these are already in the playlist...?
I haven't used this in the albumview, yet - so I don't know the concept - does it jump back/forward, if it's already in the list?
It's surely a matter of concept, but I really wouldn't mind to have same titles several times in the list. It even could be desireable to have it like this