Improvements and fixes

Alerts now close when devices recover, outages wait five minutes, and strings and inverters stop being flagged after dark days or partial outages.

• An alert for a device or component that stopped sending data now closes once it is back, and notifies you at start and recovery.
• An inverter that sends nothing, and the combiner boxes behind it, now read as "Inverter not communicating" rather than as an outage.
• A connection outage at your plant now alerts you only once it has lasted five minutes, so a brief router reboot no longer wakes you.
• Strings are no longer marked as not connected after a dark or barely reporting day, and an earlier mark clears once the string measures again.
• An inverter out for part of the day is no longer reported as producing far below expectation, and an event you closed no longer re-opens.
• Expected values now use flat-mounted irradiation sensors, follow inverter orientation at plants facing several directions, and include configured strings that have never produced.
• Alerts that a feed-in meter's or an irradiation sensor's energy had to be estimated reach you again.
• A device found in a scan is identified by its make and model again, and its web page opens straight away, including over HTTPS.