[Feature Request] Add lock to screen support with hot key(Not only Scroll lock)

[xinminglai]

Hi,

Thanks for the good tool, It's a good alternative to deskflow,
Can we have a hotkey to make all inputs into current window?
In this case, when I need to move mouse to the edge the of screen,
It won't goes to other screens, Which is a bit anonying.
I do think double tapping the edge of the screen doing the switch is also a good feature too, but as I saw people already have hot key to switch screen feature is implemented.
So it makes double tapping the edge of the screen to do the switch is less important.
But locking into current screen with hotkey is really useful.

Thanks.