Add whitespace to admin body class

Props @lukecarbis

Fixes Automattic#585, Automattic#586

Author: George Stephanis

class.jetpack-network.php

@@ -120,7 +120,7 @@ public function do_automatically_add_new_site( $blog_id ) {
 	 * @since 2.9
 	 */
 	public function body_class( $classes ) {
-		return 'network-admin';
+		return trim( $classes ) . ' network-admin ';
 	}
 
 	/**

class.jetpack.php

@@ -1837,11 +1837,12 @@ function admin_body_class( $admin_body_class = '' ) {
 
 		$classes[] = self::is_active() ? 'jetpack-connected' : 'jetpack-disconnected';
 
-		return implode( ' ', array_unique( $classes ) );
+		$admin_body_class = implode( ' ', array_unique( $classes ) );
+		return " $admin_body_class ";
 	}
 
 	static function add_jetpack_pagestyles( $admin_body_class = '' ) {
-		return $admin_body_class . ' jetpack-pagestyles';
+		return $admin_body_class . ' jetpack-pagestyles ';
 	}
 
 	function prepare_connect_notice() {