The ‘for’ attribute is not valid HTML in the case of this because the
emails are invalid character sets and the input has no ID with the
email.
This changes it to a data-name which is still searchable but doesn’t
interfere with typical input behavior.
The checkboxes no longer float-left, fixing an issue with the
subscribe buttons leaning right in narrow windows.
Fixes: #1491.
Brock Whittaker
Kartik Maji
Umair Khan
Steve Howell
Tim Abbott