State restore after a restart

• State restore after a restart for shutters (last estimated position) and
  DALI/DMX lights (on/off, brightness, RGB color), via RestoreEntity. No more
  shutter stuck at "unknown" or DMX/RGB light coming back off after a restart or an
  update of Home Assistant. The restore is accurate here since only Home Assistant
  drives these outputs (the PLC's internal program is suspended).
• Toggle option "Restore state after restart" in the integration settings
  (Configure), enabled by default. Relays and on/off lights are not affected: they
  keep re-reading their real state from the PLC at startup.