I'm trying to customize the Button Style preview in the EasyBlog editor so they match what my custom buttons really look like on the front-end. The button previews are being styled by: /components/com_easyblog/themes/wireframe/styles/composer-5.2.7.min.css according to dev tools.

So I went into the EasyBlog Template Editor, chose the Wireframe theme and chose the above css file and let it create an override. However, nothing that I change in the override file is even recognized when I save, refresh and look in the EasyBlog editor. The button previews only keep their original style. How can get the override to take affect?