Improvements and fixes

Stuck inverter energy counters no longer inflate lost energy, and devices behind a Huawei data logger are detected automatically with their logger names.

• An inverter's energy counter that stands still and then jumps to catch up counts as a communication gap, not as lost energy.
• When an inverter's energy counter stays stuck after an outage, lost energy for its strings counts only the outage period, not the whole day.
• Inverters and sensors behind a Huawei data logger are detected automatically and carry the names set in the logger.