Move position of HITL to bottom. Handle no SYS_HITL param.

Warn if SYS_HITL is set

Allow Safety page editing while in flight

Switch threshold highlighting support

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Move ArduPilot preflight check handling to generic QGC

The X-UAV Mini Talon is a V-Tail plane. This commit adds the
new group "Plane V-Tail" together with a svg image for the
new group.

Don't show compass orientations for fixed orientation vehicles.

Prompt for Reboot after compass cal

This reverts commit 0507fb9b.