v0.7.3

Fixed

• With zone tracking and "follow new targets" on, the camera switched to Static each time the
  target left the area and the gimbal returned, instead of taking the next person. obsbot4linux
  caused it: the live pose came from the AI query 0x6604, polled every second, and every
  0x6604 arms a flag in the camera that turns the next return into Static. The pose now comes
  from the gimbal controller (0x0043), which does not set the flag and follows AI tracking just
  the same (#67).