[Suggestion] make "Install TYPO3" link more evident

Riccardo De Contardi reported an issue

just a suggestion - please make that link more outstanding - see for example https://wordpress.org/ the "download Wordpress" button is very evident

Reported URL:https://new.typo3.org/

User Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36