Get one label for required alert (#2041)

(cherry picked from commit 7c5e3b1)

application/asset/js/resource-form.js

@@ -384,7 +384,7 @@
  });
  if (!propIsCompleted) {
  // No completed values found for this required property.
- var propLabel = thisProp.find('.field-label').text();
+ var propLabel = thisProp.find('.field-label').last().text();
  errors.push('The following field is required: ' + propLabel);
  }
  });