Quick Navigation provides you new fast and easy way of admin section post navigation. There many ways of editing your blog posts by generally bloggers use Dashboard -> Posts -> All Posts page. Now what this new plugin does is it add a filter on ‘All posts’ list admin page and you can open any post for editing by using this dropdown showing all post on that admin page list.
Second thing Quick Navigation does is it also adds a dropdown box is edit post page from where you can directly open any post for editing soon after editing or publishing content.