Move snippet preview functionality to separate class
Make sure slug is not included when post is front page [Finishes #78992008]
codestyle
No need to pass in the post when fetching it from the property
Add documentation plus refactor
for the love of overengineering :-)
don't expose $content property
follow phpdoc standard
Merge pull request #1634 from Yoast/stories/OR/snippet-preview

Some good work by @omarreis in moving the snippet preview to its own class.