Created by: mermop
Hello friends! Long-time listener, first-time caller
This PR changes the selector for resetting rounded corners of btn elements in btn-groups from first-child to first-of-type to accommodate hidden inputs in sets of checkboxes or radio buttons.
The Rails collection_check_box or Simple Form or Formtastic all add a hidden input either at the beginning or end of a collection of check boxes or radio buttons. This makes implementing groups of checkboxes or radio buttons as per the documentation either painful or slightly ugly.


