start_point_queue_mode fails if the robot has moved since being powered off #361
Description
This is basically the same problem as #37.
It can also happen if restoring an old CMOS backup.
When you attempt to start_point_queue_mode, the pendant raises alarm OUT OF RANGE (DROP-VALUE). But the service call just returns The controller has an active Error: Can't turn on servo because: 'Servo power cannot be turned on' (0x3450). So, the message isn't necessarily wrong, it's just not helpful.
In my case, I was able to just reset the alarm and try again. But usually, this alarm requires you to verify the home-position before you can proceed.
I'm not yet sure how to detect this scenario so that we can provide a better error code.