Improvements and fixes

Energy totals stay correct on plants with gaps in inverter data, and components now show their orientation, a status distribution and marked abnormal days.

• Energy totals per inverter and combiner box no longer come out wrong on plants whose inverters log data with gaps.
• An inverter's, combiner box's or string's detail view shows a status distribution: days producing normally, degraded, not producing or without data.
• The production page's month view marks days whose status was not normal with a coloured dot above the bar, explained in the legend.
• The analysis page's inverter, combiner box and string tables show each component's orientation and can be sorted and filtered by it.