* Reduce RAM usage for advanced joystick system on radio:
- Don't allocate memory blocks unless joystick mode is being used.
Support multiple radio joystick configurations in Companion:
- Save configured joystick settings by joystick name in Companion settings.
- Save last joystick name used in each profile.
- Reload joystick settings by name when profile is changed.
* Only show configuration for used axes and buttons in Companion.
Send actual number of configured joystick buttons from radio in USB packet.
* Fix issue where USB joystick not recognised if no buttons configured.
* Fix compiler warnings.
* Remove debugging.
* Fix crash in Companion.
* Change channel 8 to type 'dial', workaround for Linux mapping issue.
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Co-authored-by: Phil Mitchell <phil.a.mitchell@gmail.com>
