Power management, screen brightness bar

Hello, please add to the power management tab the option to set at what percentage it is allowed to shut down, for example at 0%.

There is also an option for better control of the for jumps to set the screen brightness bar, such as 1 emby 1%, etc.

It also shows, in the middle of the screen, the changes to special keys, such as Caps Lock and Num Lock, for better visual guidance.

Sucess!