Add DpiScaler for fixed pixel sizes conversion
Do some scaling in AudioControls and SeekSlider
Force SuperCollection icon to be rendered big enough for HiDPI displays.
Force Playlist icon to be rendered big enough for HiDPI displays.
Force Auto & Station icons to be rendered big enough for HiDPI displays.
Force NetworkActivity icon to be rendered big enough for HiDPI displays.
Force NewAdditions icon to be rendered big enough for HiDPI displays.
Added convenience static methods to DpiScaler
Use DpiScaler for ViewPage header icons.