Type 1 vs Type 2 clarification on Configure Devices window

[reedy]

While the image at https://guide.openenergymonitor.org/images/applications/solar-pv/solar-pv-install.webp on https://guide.openenergymonitor.org/applications/solar-pv/ explains what Type 1 vs Type 2, it's not immediately obvious what those mean from the "Configure Device" window

I've no idea if HTML link parsing will work from the JSON files (not tested yet)... But having some sort of reference link there to https://guide.openenergymonitor.org/applications/solar-pv/#sensor-installation would potentially be useful for those browsing around the interface who may wonder what Type 1 vs Type 2 are