Dashicon

Add a dashicon to your next release of twitter tools for people who have enabled the admin ui.

/**
	 * Registers the aktt_tweet post type
	 *
	 * @return void
	 */
	static function register_post_type() {
		register_post_type(self::$post_type, array(
			'labels' => array(
				'name' => __('Tweets', 'twitter-tools'),
				'singular_name' => __('Tweet', 'twitter-tools')
			),
			'supports' => array(
				'editor',
				'thumbnail',
			),
			'public' => (bool) self::option('tweet_visibility'),
			'show_ui' => (bool) self::option('tweet_admin_ui'),
			'rewrite' => array(
				'slug' => 'tweets',
				'with_front' => false
			),
			'has_archive' => true,
			'menu_icon' => 'dashicons-twitter',
		));
	}

Cheers,
Chris

https://wordpress.org/plugins/twitter-tools/