Commander: only add *autopilot disengaged* to failsafe notifactions in special cases

[sfuhrer]

Solved Problem

In a generic failsafe, the message "autopilot disengaged" is wrong. E.g. it now displays the following for a Land failsafe due to geofence breach:

Solution

Only keep the "autopilot disengaged" in case the autopilot is no longer controlling the vehicle's position. This is a bit arbitrary but I guess the best approximation to what "autopilot disengaged" implies, as then without any user input the vehicle will likely crash - thus the extra warning with the implication that the pilot should take over control if possible.

With this change the geofence breach failsafe notification would looks like this:

Changelog Entry

For release notes:

Improvement: Commander: only add *autopilot disengaged* to failsafe notifactions in special cases

Context

This was originally added in #22902.