ToolKitRC M7 - Backlight, Buzzer, and Language Settings

@ToolkiRC 2021
42
selection interface
Backlight: The backlight brightness level of the display
can be set from 1-10
Buzzer: The tone of the buzzer, can be set to off.
Language: System display language. English, Chinese,
etc. can be selected
Theme style: Can be set to light and dark themes
Default：Restore all setting items to factory value
ID：Independent ID for each device