[FEATURE] Tracker for pointers from graphics tablets

[TheSandBoxMKG]

As of now, the extension does not work using the Wacom Intuos graphics tablet, the graphics tablet's input is just ignored.

[djinnalexio]

Tablets have a separate cursor from the main one controlled by the mouse. That's for example why the cursor can seem to be in 2 places at once or stay invisible while a tablet is being used. In our case, the extension only tracks the "main" cursor which is why tablets don't work.

I'll look into it more.