Checkbox Accesbility Issues

[jeremyredhead]

I noticed that the various checkboxes used on the configuration page(s) are not actually associated with their corresponding labels; fixing this would allow selection by label-clicking (as labels are intended to function).
I'm not sure if this is a particularly pressing issue, but it's rather annoying :P

Either way, I'd be willing to (try to) fix this myself in a PR; just ping me to let me know if I should!