// good systray icons support 32 bit depth, but some icons are still 24 bit.
// We create a heuristic mask for these icons, i.e. we get the rgb value in the top left corner, and
// good systray icons support 32 bit depth, but some icons are still 24 bit.
// We create a heuristic mask for these icons, i.e. we get the rgb value in the top left corner, and