I think after some time the sidebar should only the icons of the playlist, devices, etc like in harvey's screenshot. https://lh4.googleusercontent.com/-hPPUveK_RLQ/UQGJ7MlWriI/AAAAAAAAJ6E/eq9thevbUXo/w737-h543-no/mock-up.jpg Then if the user moves the mouse on the sidebar it expands and shows the label of the playlist, devices, etc. again.
I think after some time the sidebar should only the icons of the playlist, devices, etc like in harvey's screenshot. /lh4.googleuser content. com/-hPPUveK_ RLQ/UQGJ7MlWriI /AAAAAAAAJ6E/ eq9thevbUXo/ w737-h543- no/mock- up.jpg
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Then if the user moves the mouse on the sidebar it expands and shows the label of the playlist, devices, etc. again.