OO-3444 fix i18n key setter for FormCancel

src/main/java/org/olat/core/gui/components/form/flexible/impl/elements/FormCancel.java

@@ -153,7 +153,7 @@ public class FormCancel extends FormItemImpl implements Disposable, Cancel {
 	 * @see org.olat.core.gui.components.form.flexible.elements.Cancel#setI18nKey(java.lang.String)
 	 */
 	public void setI18nKey(String i18n) {
-		cancelLink.setTitle(i18n);
+		cancelLink.setCustomDisplayText(translator.translate(i18n));
 	}
 
 	/**

src/main/java/org/olat/registration/DisclaimerFormController.java

@@ -24,6 +24,7 @@ import org.olat.core.gui.components.form.flexible.FormItemContainer;
 import org.olat.core.gui.components.form.flexible.elements.MultipleSelectionElement;
 import org.olat.core.gui.components.form.flexible.impl.FormBasicController;
 import org.olat.core.gui.components.form.flexible.impl.FormLayoutContainer;
+import org.olat.core.gui.components.form.flexible.impl.elements.FormCancel;
 import org.olat.core.gui.control.Controller;
 import org.olat.core.gui.control.Event;
 import org.olat.core.gui.control.WindowControl;
@@ -118,7 +119,8 @@ public class DisclaimerFormController extends FormBasicController {
 			formLayout.add(buttonLayout);
 			buttonLayout.setElementCssClass("o_sel_disclaimer_buttons");
 			uifactory.addFormSubmitButton(DCL_ACCEPT, NLS_DISCLAIMER_OK, buttonLayout);
-			uifactory.addFormCancelButton(NLS_DISCLAIMER_NOK, buttonLayout, ureq, getWindowControl());			
+			FormCancel cancelButton = uifactory.addFormCancelButton(NLS_DISCLAIMER_NOK, buttonLayout, ureq, getWindowControl());	
+			cancelButton.setI18nKey(NLS_DISCLAIMER_NOK);
 		}
 	}
 }