@aidancarbonix tagging you as reviewer so you can test this in SITL, but do please also look through the lua (edit: I think you already did actually)

Noting here that at the moment I don't really like the behaviour that it disappears from the HUD while the assist is still ongoing. We are testing to try and get it to stay more consistently.

If possible, I would also remove the "Alt assist: X" alert which is redundant.

Will merge the code in Cx_built_in_test and raise a PR after which will close this PR.

Please tag me in the new PR @loki077 so we can check that the functionality is good :)

Just a couple of requests for this feature is that with the QASSIST message, could we try to ensure that this only occurs in FW when required so for instance we would not see it on the ground, disarmed in FW modes and also not on intentional transitions and reverse transitions. Only for dropping below QAssist speed during normal flight.