Add Lebenlang LBL0380 heater (#4099)
* Added Lebenlang LBL0380 heater
* Add Lebenlang LBL0380 heater to devices list
* Refactor preset_mode mapping to use translations
- Updated preset_mode values to use lowercase and removed unnecessary quotes.
- remove measurement class from countdown, it is not really a measurement and it does not need to use space for long term statistics.
PR #4099
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Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>