One of the key features in WordPress 4.3 is that comments on pages are disabled by default. If you only enable comments for posts, you may be interested in WP Comment Humility, a new plugin created by John James Jacoby that moves the top-level Comments menu item to the Posts menu. The following screenshot better illustrates what it does.
If a site enables comments for posts only, this location for the menu item makes sense. What if you’re using Custom Post Types? According the plugin’s FAQ, the user experience might be weird, “If you have a post type other than post that supports comments, it may make more sense to not use this plugin,” Jacoby said. He suggests giving it a try and if the user experience doesn’t feel right, to disable it.
Documentation is located on GitHub where you can also submit Pull Requests. WP Comment Humility works out-of-the-box without any configuration options on WordPress 4.3 and is available for free in the WordPress plugin directory.