Supress disarm in manual mode (only for Fixed Wing)

[jstrebel]

Describe the enhancement: To test the flight behavior of new fixed wing UAVs it may be necessary to perform flight maneuvers in manual mode that result in a "disarm" in the current XP4 software. This type of flight movement may be required to put the FW into critical flight conditions to determine how the aircraft is behaving. Currently, remote control is no longer possible, it results in a crash.

To Reproduce: Put the FW upside down (180° Roll). FW in going to disarm. 
 Expected behavior Insert an optional parameter so that disarm can be suppressed.