Next steps :
- change icons
- continue to apply these new colors (scrollbar, shadow when pressed
        button...)
- change the audio player
- hunt residual useless code
- ?attr can't be used in xml/color and xml/drawable,
  so those should not be used directly in layouts :
    - list_menu
    - list_subtitle
    - list_title_last
    - list_title
    - background_item