bulk-edit-fill class not coming for FileField in Bulk_edit option

### Model
file_item = models.FileField(blank=False, verbose_name=_('ABC'),)

### Admin
bulk_list_display = ['file_item']

### Expected behaviour
Want this file field to be copied over selected assets for bulk_edit

### Actual behaviour
copy button is missing (class=bulk-edit-fill is not applied) over selected assets for bulk_edit for FileField

### Tried Code (fill-fields.js)

`

// Fill fields in bulk edit and split asset forms
(function($) {
$(function () {
"use strict";
// We use absolute positioning for toolbar therefore body must be relative
$('body').css('position', 'relative');
// Disable autocomplete without cluttering html attributes
$('input').attr('autocomplete', 'off');

var $fill_elements = $(
'input[type=text]:not(.no-fillable), input[type=file]:not(.no-fillable), select, textarea, input[type=number]:not(.no-fillable), auto-complete:not(.no-fillable)',
$('.bulk-edit.result-list')
);
var file_field_selector = function(input_id, $fields) {
var current_href = $('#' + input_id).siblings("a").attr("href")
var current_text = $('#' + input_id).siblings("a").text()
$fields.siblings("a").attr("href", current_href);
$fields.siblings("a").text(current_text);
}
var toggle_toolbar = function(element) {
var $parent = element.closest('td');
var $toolbar = $parent.find('.float_toolbar');
if ($toolbar.length === 0) {
var parent_height = $parent.height();
$toolbar = $('#float_toolbar').clone();
$toolbar.removeAttr('id');
if (element[0].tagName === 'AUTO-COMPLETE') {
$toolbar.data(
'input_id',
$parent.find('auto-complete')[0].id
);
} else {
var $input = $parent.find('input, select, textarea');
$toolbar.data('input_id', $input[0].id);
$toolbar.data('input_type', $input[0].type);
}
$parent.append($toolbar);
$parent.css('position', 'relative');
$toolbar.css('top', parent_height / 2 - 12 + 'px');

$toolbar.on('click', function(event) {
event.preventDefault();
var att_type = $(this).data('input_type')
var input_id = $(this).data('input_id');
var matcher = /(.*)-([0-9]+)-(.*)/;
var results = matcher.exec(input_id);
if (results) {
var $fields = $('[id^=' + results[1] + '-][id$=-' + results[3] + ']');
if (att_type === "file"){
file_field_selector(input_id, $fields)
}
else{
var value = $('#' + input_id).val();
$fields.val(value);
}
$fields.closest('td').addClass('fill-changed');
$fields.closest('td').animate({backgroundColor: 'white'});
}
});
$toolbar.show();
}
};

$fill_elements.each(function(i, element) {
toggle_toolbar($(element));
});
});
})(ralph.jQuery);
`