Add option for focus follows the mouse mode

[alexdenerqal]

For use when the desktop is configured with window focus following the mouse cursor: with the option enabled and while thouching the joystick, the cursor will not move on the screen allowing for moving both lasers to the keyboard without changing window focus.

I only tested it with OpenVR (SteamVR) and the index controllers, so it would be nice if someone could try it out with the oculus controllers and OpenXR as well.

[galister]

i'm not sure if click modifier is the way to go here, tbh. i think constantly having to juggle your thumb between moving mouse and doing clicks could be a turn-off for some.

i think a more intuitive way would be to move mouse on trigger touch / soft pull (if focus-follows-mouse mode is enabled).

let me know what you think as i'm actually very interested in getting a nice solution for this.

[alexdenerqal]

yep, the trigger touch feels way more natural, updated the pr accordingly

however I do not know how to properly map a soft pull for vive (IIRC they don't have trigger touch sensors?), and as I did not find any examples online, and I do not have vive wands to quickly test with, those are still omitted for now.

[galister]

nice, thanks so much