Replace PositionRoam with VelocityRoam
Make VelocityRoam an explicit flight mode to simplify access
Disable PositionRoam as not supported and not suitable to retain.
- Support blocks of led for notification (that is a certain number of leds between a min and a max index);
- Fix an issue with bogus colours on fast updates at LED N°0.
- Add NOTIFY_SEQUENCE_NULL to skip handling a specific alarm status;
- Adjust sequences and add Config and Receiver Alarms;
- fix issue with Alarm trigger/repetition;
- Enables Notify module only if a WS281x output is enabled.
- Add some documentation for sequence/alarm definitions (sequences.h)
- Make sequences more coherent. All GPS related info are now shown in green.
- Revert to original blinking rate for onboard led
- add Notify on DiscoveryF4Bare target
