feat: add "Trims" option to Reset special function

[3djc]

Fixes #5274

Summary of changes:
adds "trims" choice to reset function. Activate reset all trims to 0 in current flight mode.

[3djc]

@elecpower could you have a look at the companion side. Tested it ok, but I might have overlocked something

[elecpower]

@elecpower could you have a look at the companion side. Tested it ok, but I might have overlocked something

I've only had time for a quick desk check and I pretty sure there are some more +2 -> +3 changes required as sensors follow your new Trim

[3djc]

@elecpower could you have a look at the companion side. Tested it ok, but I might have overlocked something

I've only had time for a quick desk check and I pretty sure there are some more +2 -> +3 changes required as sensors follow your new Trim

Was able to find 2 more, also used a constant

[elecpower]

@3djc I took some liberties, hope you don't mind. Also uncovered a couple of source inversion introduced bugs which I have fixed here as well as a separate PR in case @pfeerick merges in different order.
Tested in Companion and checked tx16s simulator mirrored the settings. So its a tick from me.

[3djc]

Thanks a lot Neil :)

[elecpower]

and then an after-thought about my millstone binary import

[pfeerick]

LGTM on TX12MK2 :)

[TGS78]

Is it possible to reset individual trims instead of all?

[pfeerick]

Not a present I think. I was about to say this level of detail may be better via Lua script, but it doesn't seem possible there. So maybe it would be an idea to be able to reset the individual trims also as a further extension of this.