Add possibility to take network commands without fully participate to CH network protocol.
Various network enhancements and fixes.
Fix GPS module detection
When using the option 'Always on' for the setting "GPS power" there could be a faulty detection of the GPS module during a subsequent T1 power on. This leads to a change of the "Tracker source" from "GPS" to "Reference In", which remains as long as the user don't set it back (if possible).