fix(calendar,preferences) Small fixes for commit 5c4d467d and 6050c4ee

UI/WebServerResources/js/Scheduler/sgCalendarListItem.directive.js

@@ -300,7 +300,7 @@
             }
 
             function clipboard(elem_id) {
-              let linkUrl = document.getElementById(elem_id);
+              var linkUrl = document.getElementById(elem_id);
               navigator.clipboard.writeText(linkUrl.value);
             }
           }