Type StatusIcon
type StatusIcon struct {
// Size is the width and height in pixels. 32 or more keeps it sharp on the
// densest bars; the platform scales it to the size its bar draws.
Size int
// RGBA is Size*Size straight (not premultiplied) 8-bit pixels, top row
// first.
RGBA []byte
// Template marks a shape that only has an alpha channel to say: the
// platform colors it to suit the bar, light on dark and dark on light.
Template bool
}StatusIcon is a square image for the system's status area.