Provide audible feedback that config has been saved from the TX sticks

[MartinHugh]

Current Behavior

When saving configuration from the TX sticks, although a default beep is played to indicate "some" stick input was made, there is no audible indication that settings were actually saved. If for some reason the wrong stick inputs were used, and the pilot did not have goggles on (typically I dont when maidening and doing initial tuning) it is not obvious whether the config was saved or not.

Desired Behavior

Play a simple beep sequence when settings are saved from the sticks.

Suggested Solution

See desired behaviour

Who does this impact? Who is this for?

Users who are using stick saving and have no OSD queues as to what is happening, particularly on initial maidens etc