Clean frontend code

Frontend/assets/scripts/tools/mock/uianimation.js

@@ -60,9 +60,9 @@ function showHeaders(){
     $('#headersTab').off('click');
 }
 
-function showHeadersHistory(element){
+function showHeadersHistory(record){
    historyTable = '';
-   headers = parseHeaders(element.id)
+   headers = parseHeaders(record.id)
    headers.forEach(
     (value,key) => {
         historyTable +=