OO-1684: fix id of orientation GUI element, fix wording, fix preview link

src/main/java/org/olat/course/certificate/ui/CertificateChooserController.java

@@ -101,13 +101,13 @@ public class CertificateChooserController extends UploadCertificateController {
 		fileEl.addActionListener(FormEvent.ONCHANGE);
 		
 		String[] orientationValues = new String[]{
-			translate("portrait"), translate("orientation")
+			translate("portrait"), translate("landscape")
 		};
 		orientationEl = uifactory.addRadiosVertical("orientation", formLayout, orientationKeys, orientationValues);
 		orientationEl.select(orientationKeys[0], true);
 		orientationEl.setVisible(false);
 		
-		formatEl = uifactory.addRadiosVertical("orientation", formLayout, formatKeys, formatKeys);
+		formatEl = uifactory.addRadiosVertical("format", formLayout, formatKeys, formatKeys);
 		formatEl.select(formatKeys[0], true);
 		formatEl.setVisible(false);
 		

src/main/java/org/olat/course/certificate/ui/CertificatesOptionsController.java

@@ -187,7 +187,6 @@ public class CertificatesOptionsController extends FormBasicController {
 		}
 
 		previewTemplateLink = LinkFactory.createButton("preview", templateCont.getFormItemComponent(), this);
-		previewTemplateLink.setEnabled(hasTemplate);
 		previewTemplateLink.setTarget("preview");
 		
 		boolean reCertificationEnabled = courseConfig.isRecertificationEnabled();