Converted issuable_index to axios

app/assets/javascripts/issuable_index.js

+import axios from './lib/utils/axios_utils';
+import flash from './flash';
+import { __ } from './locale';
 import IssuableBulkUpdateSidebar from './issuable_bulk_update_sidebar';
 import IssuableBulkUpdateActions from './issuable_bulk_update_actions';
 
@@ -23,19 +26,18 @@ export default class IssuableIndex {
     $('.incoming-email-token-reset').on('click', (e) => {
       e.preventDefault();
 
-      $.ajax({
-        type: 'PUT',
-        url: $('.incoming-email-token-reset').attr('href'),
-        dataType: 'json',
-        success(response) {
-          $('#issuable_email').val(response.new_address).focus();
-        },
-        beforeSend() {
       $('.incoming-email-token-reset').text('resetting...');
-        },
-        complete() {
+
+      axios.put($('.incoming-email-token-reset').attr('href'))
+        .then(({ data }) => {
+          $('#issuable_email').val(data.new_address).focus();
+
+          $('.incoming-email-token-reset').text('reset it');
+        })
+        .catch(() => {
+          flash(__('There was an error when reseting email token.'));
+
           $('.incoming-email-token-reset').text('reset it');
-        },
         });
     });
   }