Mac2MQTT v0.4.7

• The display reads off when its monitor has no power, as one on a smart
  plug that is switched off, not only when it sleeps.
• Screen Lock replaces Screen Locked in Home Assistant: it reads Locked or
  Unlocked, with a lock that closes and opens, where Screen Locked read On
  while the screen was locked. Its entity is new
  (binary_sensor._screen_lock, on while unlocked): update the
  automations that used Screen Locked.