ChoiceResponse response = (ChoiceResponse) obj;
// response-level feedback
Material responseFeedbackMat = QTIEditHelper.getFeedbackOlatRespMaterial(item, response.getIdent());
responseFeedbackMat = responseFeedbackMat == null ? new Material() : responseFeedbackMat;
identities.put(responseFeedbackMat, response.getIdent());
RichTextElement responseHintText = uifactory.addRichTextElementForStringData("feedback_" + i, null, responseFeedbackMat
.renderAsHtml(mediaBaseUrl), 4, -1, true, true, baseContainer, null, responseLevelHintsLayout, ureq.getUserSession(),
getWindowControl());
FormLink link = uifactory.addFormLink("link_" + i, responseLevelHintsLayout, Link.NONTRANSLATED + Link.LINK_CUSTOM_CSS);
((Link) link.getComponent()).setCustomDisplayText("");
((Link) link.getComponent()).setCustomEnabledLinkCSS("b_small_icon b_edit_icon");