commander: fix enable_failsafe reason (#19391)

- In this case, no action is configured for datalink lost. Action is configured for RC lost.
 - In case of no data link and no rc failsafe is enabled but reporting a "no_datalink" reason but "no_rc_and_no_datalink" seems more explicit.

src/modules/commander/state_machine_helper.cpp

@@ -412,7 +412,7 @@ bool set_nav_state(vehicle_status_s &status, actuator_armed_s &armed, commander_
 			// All links lost, no data link loss reaction configured -> immediately do RC loss reaction
 			// Lost all communication, by default it's considered unsafe to continue the mission
 			// This is only reached when flying mission completely without RC (it was not present since boot)
-			enable_failsafe(status, old_failsafe, mavlink_log_pub, event_failsafe_reason_t::no_datalink);
+			enable_failsafe(status, old_failsafe, mavlink_log_pub, event_failsafe_reason_t::no_rc_and_no_datalink);
 			set_link_loss_nav_state(status, armed, status_flags, internal_state, rc_loss_act, 0);
 
 		} else if (status.rc_signal_lost && (param_com_rcl_except & RCLossExceptionBits::RCL_EXCEPT_MISSION)
@@ -462,7 +462,7 @@ bool set_nav_state(vehicle_status_s &status, actuator_armed_s &armed, commander_
 			// All links lost, no data link loss reaction configured -> immediately do RC loss reaction
 			// Lost all communication, by default it's considered unsafe to continue the mission
 			// This is only reached when flying mission completely without RC (it was not present since boot)
-			enable_failsafe(status, old_failsafe, mavlink_log_pub, event_failsafe_reason_t::no_datalink);
+			enable_failsafe(status, old_failsafe, mavlink_log_pub, event_failsafe_reason_t::no_rc_and_no_datalink);
 			set_link_loss_nav_state(status, armed, status_flags, internal_state, rc_loss_act, 0);
 
 		} else {
@@ -578,7 +578,7 @@ bool set_nav_state(vehicle_status_s &status, actuator_armed_s &armed, commander_
 			// All links lost, no data link loss reaction configured -> immediately do RC loss reaction
 			// Lost all communication, by default it's considered unsafe to continue the mission
 			// This is only reached when flying mission completely without RC (it was not present since boot)
-			enable_failsafe(status, old_failsafe, mavlink_log_pub, event_failsafe_reason_t::no_datalink);
+			enable_failsafe(status, old_failsafe, mavlink_log_pub, event_failsafe_reason_t::no_rc_and_no_datalink);
 			set_link_loss_nav_state(status, armed, status_flags, internal_state, rc_loss_act, 0);
 
 		} else {