Show "No" values on event pages

"No" (i.e. a "false" response to a boolean form item) should be shown
on an event page, since it's a valid, non-blank response to that
question.  However, because it's falsy, it's being hidden right now.
This fixes that.

app/javascript/EventsApp/EventPage/useSectionizedFormItems.ts

@@ -14,7 +14,7 @@ function getSectionizedFormItems(formData: EventPageForm, formResponse: Record<s
       item.identifier !== 'title' &&
       item.public_description != null &&
       item.public_description.trim().length > 0 &&
-      formResponse[item.identifier],
+      (formResponse[item.identifier] || formResponse[item.identifier] === false),
   );
   const shortFormItems: TypedFormItem[] = [];
   const secretFormItems: TypedFormItem[] = [];