Add for attribut to labels and id attribut to inputs

[tyrann0us]

Hi,
when using radio boxes (not tested with checkboxes) clicking a label doesn't select the corresponding input.
Simply add a combination of for and id attributes to the label and input elements to make it working,
Thanks!

[TimPerry]

Howdy,

I no longer use wordpress in my day-to-day so not actively maintaining this project. PRs are welcome. If I get time over the holidays this year I might take a bit of time to update it and add some features.

Cheers,

Tim