The plugin restores the Title field (that was removed from WordPress 4.2) in the insert link popup box and adds a new Add rel="nofollow" to link checkbox to it.
Gutengerg (Block Editor) Note: At the moment it’s not possible to add the functionality to Gutenberg, it’s a different system from the classic editor and it does not have a hook/filter which allows adding custom settings. As soon as it becomes possible to add the functionality to Gutenberg we will update the plugin.
This plugin has been adopted and maintained by WPKube, a popular WordPress resource site, where you can find guides on WordPress plugins, WordPress Hosting, and more.