Limit the job queue to max_distance around the player.

[madmaxoft]

This limits queueing the areas for job search to only such areas that are currently reachable by the drones.

This fixes a bad behavior: when either a huge blueprint or a big deconstruction area is placed by the player, which would queue up potentially thousands of areas to search, practically disabling the companions for minutes at a time.

[Klonan]

Looks good, thank you