Auditors: @bsclifton

fix #5337

Test Plan:

* Access new tab page;
* Access 4-6 websites;
* Pin a site. Pinning a site should add a Pin icon on top-right corner and be kept on its position (not jump);
* Keep in mind the website position and reorder it to a new position;
* Access another website and get back to new tab. Ensure that your last pinned website kept its position;