Micha? Ochman

<a href="http://blog.scur.pl/wordpress-post-link-shortcode/" rel="nofollow ugc">Post link shortcode</a> is a WordPress plugin that adds a possiblity to link to posts and pages within your post or page content using a custom shortcode.
For more information, check out <a href="http://blog.scur.pl/wordpress-post-link-shortcode/" rel="nofollow ugc">Post link shortcode</a>.
Features include:
<ul>
<li>Usage as simple as using [post] in your post/page content</li>
<li>Customising the output by specifying anchor title, text and custom CSS classes</li>
</ul>

Post link shortcode

Link to posts and pages from your content using a simple shortcode.

WPKube

The plugin restores the <code>Title</code> field (that was removed from WordPress 4.2) in the insert link popup box and adds a new <code>Add rel="nofollow" to link</code> 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 <a href="https://www.wpkube.com/" rel="nofollow ugc">WPKube</a>, a popular WordPress resource site, where you can find guides on <a href="https://www.wpkube.com/category/wordpress-plugins/" rel="nofollow ugc">WordPress plugins</a>, <a href="https://www.wpkube.com/best-wordpress-hosting/" rel="nofollow ugc">WordPress Hosting</a>, and more.

Title and Nofollow For Links (Classic Editor)

I just installed this on WP 4.9, and it works like a charm. I ended up adding HTML Class manipulation as well, by coping the code in the JS file that added the title field.

Works Well

works with wp 5.2.1

Helpful tool

The plugin adds a title and a rel="nofollow" checkbox to the insert link popup box. Only for Classic Editor, NOT Block Editor.

Post link shortcode vs Title and Nofollow For Links (Classic Editor)