Improvements and fixes

A notification reaches every recipient even when one delivery fails. Dashboard counters no longer freeze, and an energy bar ten times the others is marked as "logger problem".

• A notification reaches its remaining recipients again even when one delivery fails.
• Dashboard KPI counters no longer freeze after the page is left.
• On the battery dashboard and the "Turbines" page, an energy bar at ten times the other bars is marked as a "logger problem".
• The "Data Export" search now finds a metric by the measurement it reads.
• Settled curtailment exports state which values may still change.
• The plant's central AC measurements leave the export pickers.