Add size argument to image field
check attachment.sizes[size]

If you wanna use custom image sizes, add this filter:
```php
add_filter( 'image_size_names_choose', function() {
$possible_sizes = get_intermediate_image_sizes();
unset( $possible_sizes['full'] );
return $possible_sizes;
} );
```
Add "+ Add" button at bottom of bundle form
Bundle support

+add - bundle support for:
- checkbox
- checkboxes
- color
- date
- datetime
- file
- multi-select
- post-checkboxes
- post-select
- radios
- select
- term-checkboxes
- term-select
- time
- wysiwyg
- yesno

!fix - focusing on element when you click on his label
+add - datetime format converter (php->js)