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.

Updating localization sources

This prevents intersection misses on more cases

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

Seems to work fine without out.

It did not like the use of the tr() macro within a static QString in the constructor.