New: Additional tooltips for icon buttons

(cherry picked from commit 8c07f0d3d19a48ed96d1ded54399c66bf2977b2a)

Closes #9253

frontend/src/Components/Modal/ModalContent.js

@@ -3,6 +3,7 @@ import React from 'react';
 import Icon from 'Components/Icon';
 import Link from 'Components/Link/Link';
 import { icons } from 'Helpers/Props';
+import translate from 'Utilities/String/translate';
 import styles from './ModalContent.css';
 
 function ModalContent(props) {
@@ -28,6 +29,7 @@ function ModalContent(props) {
             <Icon
               name={icons.CLOSE}
               size={18}
+              title={translate('Close')}
             />
           </Link>
       }