fix: trim long text in links in the social networks block (#915)

src/account-settings/EditableField.jsx

@@ -1,6 +1,7 @@
 import React from 'react';
 import PropTypes from 'prop-types';
 import { connect } from 'react-redux';
+import classNames from 'classnames';
 import { injectIntl, intlShape } from '@edx/frontend-platform/i18n';
 import {
   Button, Form, StatefulButton,
@@ -155,7 +156,7 @@ const EditableField = (props) => {
                 </Button>
               ) : null}
             </div>
-            <p data-hj-suppress className={isGrayedOut ? 'grayed-out' : null}>{renderValue(value)}</p>
+            <p data-hj-suppress className={classNames('text-truncate', { 'grayed-out': isGrayedOut })}>{renderValue(value)}</p>
             <p className="small text-muted mt-n2">{renderConfirmationMessage() || helpText}</p>
           </div>
         ),