Correct some minor exam supporter rights

src/main/java/ch/ethz/seb/sebserver/gui/content/ExamForm.java

@@ -390,7 +390,7 @@ public class ExamForm implements TemplateComposer {
                 .withExec(this.examCreateClientConfigPopup.exportFunction(
                         exam.institutionId,
                         exam.getName()))
-                .publishIf(() -> writeGrant && readonly)
+                .publishIf(() -> modifyGrant && readonly)
 
                 .newAction(ActionDefinition.EXAM_MODIFY_SEB_RESTRICTION_DETAILS)
                 .withEntityKey(entityKey)

src/main/java/ch/ethz/seb/sebserver/webservice/weblayer/api/LmsSetupController.java

@@ -89,7 +89,7 @@ public class LmsSetupController extends ActivatableEntityController<LmsSetup, Lm
             @PathVariable final Long modelId) {
 
         this.authorization.check(
-                PrivilegeType.MODIFY,
+                PrivilegeType.READ,
                 EntityType.LMS_SETUP,
                 institutionId);