Dimming Settings not saved

[AvidFlyr]

FW version: D2.11.87
Bootloader version: 5.0.1

Hardware: Clone

Describe the issue:
Display dimming settings are not saved to EEPROM. After a restart I always find myself lowering the dimming settings.
While not mission critical, clearly a nice enhancement to add while attending to saving the region x band settings as per #1859.

Thanks for the great work.

Ruediger DF2GR