Improvements and fixes

Each inverter, combiner box and string now shows how many days it produced normally, produced less than expected, produced nothing, or sent no data. The analysis tables now show which way each of them faces.

• The analysis tables now show which way each inverter, combiner box and string faces, and can be sorted and filtered by it.
• An inverter, combiner box or string now shows how many days it produced normally, produced less than expected, produced nothing, or sent no data.
• In the production page's month view, a coloured dot above the bar marks each day that did not run normally, as explained in the legend.