devinsays/portfolio-post-type — pull request #26 by grappler (2013-12-16 23:50:48+00:00)
Title: Add Portfolio Icon to WordPress 3.8

This solution adds the the `dashicon-portfolio` class to the `menu_icon` like explained in [WordPress core](https://github.com/WordPress/WordPress/blob/master/wp-includes/post.php#L1134)

The first css removes the background image link if it has the class `dashicons` and hides the invalid image in the older versions of WordPress.
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