* Lua array indexes start at 1
* LUA model.setFlightMode: use array index to compute trim index
This allows for providing an incomplete table like this:
```
-- Disable T5 & T6 on FM0
modes = {}
modes[5] = 31
modes[6] = 31
t = {}
t["trimsModes"] = modes
model.setFlightMode(0, t)
```
* Remove warning & cleanup
* Fix trim value constraints in model.setFlightMode()