Every TrafficFlowModule knob with its kind, description and default. Static data,
readable with no map loaded.
Remarks
The module owns whether flow is shown, which roads show it and how the flow lines look
(colors.*, widthFactor). The filters.* knobs set the fields of filters; its any, the
further filters a road may match instead, is config only, and so are events.
Every TrafficFlowModule knob with its kind, description and default. Static data, readable with no map loaded.