Playlist Background Colour Slider

Thought this was already added but in the new default skin for example using the slider (uses frames to replace the image) on the main skin but the playlist background does not inherit the same colour 
Where as a more efficient way would be to use 1 transparent(ish) image and change the background colour via code and enable that colour to propagate to child windows so if colour changed on main then playlist, library can inherit.
This would also remove some of the issues I have with the Playlist of not being able to put more than 1 image on top of each other in the playlist sections.
Don't do it for me though
Do it cos it's the right thing to do 

Where as a more efficient way would be to use 1 transparent(ish) image and change the background colour via code and enable that colour to propagate to child windows so if colour changed on main then playlist, library can inherit.
This would also remove some of the issues I have with the Playlist of not being able to put more than 1 image on top of each other in the playlist sections.
Don't do it for me though

