New logo and login page in Optimizely CMS 13.5

After upgrading to EPiServer.CMS 13.5.0, I noticed that both the login page and the editor UI look different. The old Optimizely logo, is replaced by the new logo that looks like someone has been using WordArt in Microsoft Word 97!

Optimizely CMS 13.5.0 with the new logo

Optimizely CMS 13.5.0 login page

CMS 12 has not received the new look, not even the latest version, 12.35.0.

If you have customized the login page, for example with your own CSS or by replacing images under /Util/images/, check it after upgrading. Some files have been renamed or removed, and the stylesheet has been rewritten.