Unique IDs for Button and Button States subsections

Author: ericwbailey

partials/section.forms.hbs

@@ -370,9 +370,9 @@
 
         </fieldset><!-- End of #subsection__checkboxes-and-radios -->
 
-        <fieldset id="subsection__buttons" role="region" aria-labelledby="subtitle__buttons"><!-- Start of #subsection__buttons -->
+        <fieldset id="subsection__button-states" role="region" aria-labelledby="subtitle__button-states"><!-- Start of #subsection__buttons -->
             <legend>
-                <h3 id="subtitle__buttons">Buttons</h3>
+                <h3 id="subtitle__button-states">Buttons</h3>
             </legend>
 
             <button>