Add a screen off button

[Spolfox]

Add a screen off button. In order not to wait for the backlight timer to expire. Just pressed the touch button on the screen and the screen went out, then touched the screen and it turned on, just like on the timer

[Spolfox]

@bigtreetech

@K-touch

[Rowan2233]

Hey bro, thank you for telling us this good feature, I have add it in our products road map, thank you ; )