Filament sensor status

[EDH]

Is it possible to show the status of the filament sensor switch in webinterface? I expected it to be in the Machine status section.

[dc42]

This would need some thought, because the status depends on the type of filament sensor. Simple ones show only present/not-present. The laser and magnetic ones from Duet3D don't show that unless the optional switch is connected. Instead they show whether or not the recent measured filament movement matches the commanded extrusion to within the specified tolerance.