Improvements and fixes

Live production now reaches a wind plant's turbines on every live surface, and energy counters in reports and exports read on 15-minute steps.

• A wind plant's live graph, sites live view and status digest now show live turbine power and energy.
• The revenue map's fleet rows now show a wind plant's live power and its digest energy.
• A plant's day energy figure no longer covers a different day than its day power curve in a non-UTC timezone.
• Energy counters in reports and exports read on 15-minute steps, and filtered exports over about 69 days no longer fail.
• A saved energy export template with 1-minute or 5-minute steps no longer exports.