Adding symbol instead of × for close icon

web/react/components/team_import_tab.jsx

@@ -97,7 +97,7 @@ export default class TeamImportTab extends React.Component {
                         data-dismiss='modal'
                         aria-label='Close'
                     >
-                        <span aria-hidden='true'>&times;</span>
+                        <span aria-hidden='true'>{'×'}</span>
                     </button>
                     <h4
                         className='modal-title'