/**
*Open Visit Site in new tab
*/ 
function visit_site_admin_bar_on_new_tab( $wp_admin_bar ) {
    if ( ! current_user_can( 'manage_options' ) ) {
        return;
    }
    $wp_admin_bar -> add_node([
        'parent'        =>  'site-name',
        'id'            =>  'view-site',
        'href'          =>  home_url( '/' ),
        'meta'          =>  [
            'target'    => '_blank',
            'class'     =>  'external_link'
        ]
    ]);
}
add_action( 'admin_bar_menu', 'visit_site_admin_bar_on_new_tab', 80 );
function visit_site_new_tab_styles() {
echo '<style>#wpadminbar .quicklinks .menupop ul li.external_link .ab-item:before {content: "\f504";}</style>';
}
add_action('admin_print_styles', 'visit_site_new_tab_styles');