Supply system-level results for all granularities

[lboeman]

I would like to be able to plot the system-wide results that come from the compare workflow. If I upload site level actual performance, I will want to compare to site level weather adjusted, but the only options are inverter level.

I can add all the inverters but that does not make for a very useful graph.

And I could download the inverter level results and sum them myself and make my own graph, but I would like the tool to be able to do that.

Originally posted by @ncroft-b4 in #180 (comment)

[nate-croft]

I just realized that the tool does allow for plotting and downloading of system-level performance data for the compare case that is expected (modelled) vs actual. It was just for the Forecast (reference) vs actual that it did not supply the site-level results.

For the expected (modeled) vs actual, everything did work as expected for me: