Adds id attributes to fieldsets in review request details template.

This allows extensions to hide an entire fieldset from the UI only without
impacting backend operations, or to style selected fieldsets differently from
others.

eg. an extension may render a fieldset in a different manner, but store the
data in the standard fields.  Unregistering the fieldset would break
functionality when all that's required UI hiding.

updated template, ensured id attributes where rendered in the generated html.