dirtometer: Blink stats background rather than foreground on activity
dirtometer: Blink stats background rather than foreground on activity

- Blink the background of a statistics value rather than the foreground
on I/O activity

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr