Enable forwarding of frames for any mode
As raised per issue satnogs-decoders#62 (closed), the frames demodulated by the gr-satellites
add-on don't reach the influxDB instance that feeds satnogs-dashboards. A short investigation shows that the frames are intact. Further investigation shows that for any "generous" mode (like FM) there is forwarding of data frames disabled, because we do not expect any data from that mode. With gr-satellites
as add-on we never know which mode is used in the background. Data forwarding should be enabled for any mode.