It was broken when temperature translation was added in babbfbd1
The system wasn't quite setup to handle anything other than speed and distance. Changed so any arbitrary unit type can be converted to another.

Float comparison to flakey cross-platform

Move  MAV_PARAM_TYPE to  MAV_PARAM_EXT_TYPE as we're now using the proper MAVLink version.

Updating localization sources

This prevents intersection misses on more cases

Otherwise things like gimbal angles end up on the wrong items.