Bug in navwalker

Hello.

There is a bug in the navwalker: you’re using incorrect data in title attribute and it’s causing problems in some cases.

In order to fix it you need to change this line:

$atts['title'] = ! empty( $item->title ) ? $item->title : '';

to this:

$atts['title'] = ! empty( $item->attr_title ) ? $item->attr_title : '';

Hope to see this fix in further versions. Thank you!