Dropdown for widget placement not working in admin pages

Hi,
When using the theme as admin theme, there is a bug in forms which use the table drag element, for example the manage form display page.
When the user tries to hide a field by clicking on the widget dropdown, the process is interrupted and the field is disabled without saving the change as you see in the screenshot below:

The bug is caused by the theme which transforms input 'edit-refresh':
Original:
<input class="visually-hidden button js-form-submit form-submit" data-drupal-selector="edit-refresh" type="submit" id="edit-refresh" name="op" value="Refresh">

Button:
<button class="visually-hidden button js-form-submit form-submit btn-default btn" data-drupal-selector="edit-refresh" type="submit" id="edit-refresh" name="op" value="Refresh">Refresh</button>

Thus the following code in field_ui.js doesn't work:

    /**
     * Triggers Ajax refresh of selected rows.
     *
     * The 'format type' selects can trigger a series of changes in child rows.
     * The #ajax behavior is therefore not attached directly to the selects, but
     * triggered manually through a hidden #ajax 'Refresh' button.
     *
     * @param {object} rows
     *   A hash object, whose keys are the names of the rows to refresh (they
     *   will receive the 'ajax-new-content' effect on the server side), and
     *   whose values are the DOM element in the row that should get an Ajax
     *   throbber.
     */
    AJAXRefreshRows: function (rows) {
        //other code
        $('input[data-drupal-selector="edit-refresh"]').trigger('mousedown'); //Line 232
       //other code
    }

Thanks